Import wiredtiger-wiredtiger-mongodb-2.8-rc7-105-g92325a3.tar.gz from wiredtiger branch mongodb-2.8

50 files changed, 703 insertions, 605 deletions

diff --git a/src/third_party/wiredtiger/.hgtags b/src/third_party/wiredtiger/.hgtags
index 054227388cf..ad2212f950a 100644
--- a/src/third_party/wiredtiger/.hgtags
+++ b/src/third_party/wiredtiger/.hgtags
@@ -26,3 +26,4 @@ b5c9f28d72fe1f835d24fe427e211a539f8709fe 1.5.2
 5c9acd2584f2657dec2a44fd8b54211bf9c21193 mongodb-2.8-rc5
 f40795b146bd35a623ef57de5b875a817925b7c9 mongodb-2.8-rc5
 c3cac38f1632e0e20d0279639bb59ff11700e692 mongodb-2.8-rc6
+9b61b870d26feafd8f8058cfffc6ac817890ce2b mongodb-2.8-rc7
diff --git a/src/third_party/wiredtiger/SConstruct b/src/third_party/wiredtiger/SConstruct
index b075afe696a..1c109c973c0 100644
--- a/src/third_party/wiredtiger/SConstruct
+++ b/src/third_party/wiredtiger/SConstruct
@@ -1,6 +1,10 @@
 # -*- mode: python; -*-
 import re
 import os
+import shutil
+import subprocess
+import sys
+import tempfile
 import textwrap
 import distutils.sysconfig
 
@@ -10,33 +14,51 @@ if not os.sys.platform == "win32":
     print ("SConstruct is only supported for Windows, use build_posix for other platforms")
     Exit(1)
 
-AddOption("--with-berkeley-db", dest="bdb", type="string", nargs=1, action="store",
-          help="Berkeley DB install path, ie, /usr/local")
+# Command line options
+#
+AddOption("--dynamic-crt", dest="dynamic-crt", action="store_true", default=False,
+          help="Link with the MSVCRT DLL version")
 
-AddOption("--enable-zlib", dest="zlib", type="string", nargs=1, action="store",
-          help="Use zlib compression")
+AddOption("--enable-attach", dest="attach", action="store_true", default=False,
+          help="Configure for debugger attach on failure.")
+
+AddOption("--enable-diagnostic", dest="diagnostic", action="store_true", default=False,
+          help="Configure WiredTiger to perform various run-time diagnostic tests. DO NOT configure this option in production environments.")
+
+AddOption("--enable-python", dest="lang-python", type="string", nargs=1, action="store",
+          help="Build Python extension, specify location of swig.exe binary")
 
 AddOption("--enable-snappy", dest="snappy", type="string", nargs=1, action="store",
           help="Use snappy compression")
 
-AddOption("--enable-swig", dest="swig", type="string", nargs=1, action="store",
-          help="Build python extension, specify location of swig.exe binary")
+AddOption("--enable-verbose", dest="verbose", action="store_true", default=False,
+          help="Configure WiredTiger to support the verbose configuration string to wiredtiger_open")
 
-AddOption("--dynamic-crt", dest="dynamic-crt", action="store_true", default=False,
-          help="Link with the MSVCRT DLL version")
+AddOption("--enable-zlib", dest="zlib", type="string", nargs=1, action="store",
+          help="Use zlib compression")
 
+AddOption("--prefix", dest="prefix", type="string", nargs=1, action="store", default="package",
+          help="Install directory")
+
+AddOption("--with-berkeley-db", dest="bdb", type="string", nargs=1, action="store",
+          help="Berkeley DB install path, ie, /usr/local")
+
+# Get the swig binary from the command line option since SCONS cannot find it automatically
+#
+swig_binary = GetOption("lang-python")
+
+# Initialize environment
+#
 env = Environment(
     CPPPATH = ["#/src/include/",
                "#/build_win",
                "#/test/windows",
                "#/.",
-               distutils.sysconfig.get_python_inc()
            ],
-    #CPPDEFINES = ["HAVE_DIAGNOSTIC", "HAVE_VERBOSE"],
     CFLAGS = [
         "/Z7", # Generate debugging symbols
         "/wd4090", # Ignore warning about mismatched const qualifiers
-        "/wd4996", 
+        "/wd4996",
         "/W3", # Warning level 3
         "/we4013", # Error on undefined functions
         "/TC", # Compile as C code
@@ -59,17 +81,12 @@ env = Environment(
         "/DYNAMICBASE",
         "/NXCOMPAT",
         ],
-    LIBPATH=[ distutils.sysconfig.PREFIX + r"\libs"],
     tools=["default", "swig", "textfile"],
-    SWIGFLAGS=['-python',
-               "-threads",
-               "-O",
-               "-nodefaultctor",
-               "-nodefaultdtor"
-    ],
-    SWIG=GetOption("swig")
+    SWIG=swig_binary
 )
 
+env['STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME'] = 1
+
 useZlib = GetOption("zlib")
 useSnappy = GetOption("snappy")
 useBdb = GetOption("bdb")
@@ -109,7 +126,24 @@ if useBdb:
 
 env = conf.Finish()
 
+# Configure build environment variables
+#
+if GetOption("attach"):
+    env.Append(CPPDEFINES = ["HAVE_ATTACH"])
+
+if GetOption("diagnostic"):
+    env.Append(CPPDEFINES = ["HAVE_DIAGNOSTIC"])
+
+if GetOption("lang-python"):
+    env.Append(LIBPATH=[distutils.sysconfig.PREFIX + r"\libs"])
+    env.Append(CPPPATH=[distutils.sysconfig.get_python_inc()])
 
+if GetOption("verbose"):
+    env.Append(CPPDEFINES = ["HAVE_VERBOSE"])
+
+
+# Build WiredTiger.h file
+#
 version_file = 'build_posix/aclocal/version-set.m4'
 
 VERSION_MAJOR = None
@@ -147,7 +181,7 @@ replacements = {
     '@wiredtiger_includes_decl@': wiredtiger_includes
 }
 
-env.Substfile(
+wtheader = env.Substfile(
     target='wiredtiger.h',
     source=[
         'src/include/wiredtiger.in',
@@ -170,11 +204,27 @@ if useZlib:
 if useSnappy:
     wtsources.append("ext/compressors/snappy/snappy_compress.c")
 
-wtlib = env.Library("wiredtiger", wtsources)
+wt_objs = [env.Object(a) for a in wtsources]
+
+# Static Library - libwiredtiger.lib
+#
+wtlib = env.Library(
+    target="libwiredtiger",
+    source=wt_objs, LIBS=wtlibs)
 
 env.Depends(wtlib, [filelistfile, version_file])
 
-env.Program("wt", [
+# Dynamically Loaded Library - wiredtiger.dll
+#
+wtdll = env.SharedLibrary(
+    target="wiredtiger",
+    source=wt_objs + ['build_win/wiredtiger.def'], LIBS=wtlibs)
+
+env.Depends(wtdll, [filelistfile, version_file])
+
+Default(wtlib, wtdll)
+
+wtbin = env.Program("wt", [
     "src/utilities/util_backup.c",
     "src/utilities/util_cpyright.c",
     "src/utilities/util_compact.c",
@@ -198,27 +248,48 @@ env.Program("wt", [
     "src/utilities/util_write.c"],
     LIBS=[wtlib] + wtlibs)
 
-if GetOption("swig"):
-    swiglib = env.SharedLibrary('_wiredtiger',
+Default(wtbin)
+
+# Python SWIG wrapper for WiredTiger
+if GetOption("lang-python"):
+    # Check that this version of python is 64-bit
+    #
+    if sys.maxsize < 2**32:
+        print "The Python Interpreter must be 64-bit in order to build the python bindings"
+        Exit(1)
+
+    pythonEnv = env.Clone()
+    pythonEnv.Append(SWIGFLAGS=[
+            "-python",
+            "-threads",
+            "-O",
+            "-nodefaultctor",
+            "-nodefaultdtor",
+            ])
+
+    swiglib = pythonEnv.SharedLibrary('_wiredtiger',
                       [ 'lang\python\wiredtiger.i'],
                       SHLIBSUFFIX=".pyd",
-                      LIBS=[wtlib])
+                      LIBS=[wtlib] + wtlibs)
 
-    copySwig = env.Command(
+    copySwig = pythonEnv.Command(
         'lang/python/wiredtiger/__init__.py',
         'lang/python/wiredtiger.py',
         Copy('$TARGET', '$SOURCE'))
-    env.Depends(copySwig, swiglib)
+    pythonEnv.Depends(copySwig, swiglib)
 
-    env.Install('lang/python/wiredtiger/', swiglib)
+    swiginstall = pythonEnv.Install('lang/python/wiredtiger/', swiglib)
+
+    Default(swiginstall, copySwig)
 
 # Shim library of functions to emulate POSIX on Windows
 shim = env.Library("window_shim",
         ["test/windows/windows_shim.c"])
 
-env.Program("t_bloom",
+t = env.Program("t_bloom",
     "test/bloom/test_bloom.c",
-    LIBS=[wtlib])
+    LIBS=[wtlib] + wtlibs)
+Default(t)
 
 #env.Program("t_checkpoint",
     #["test/checkpoint/checkpointer.c",
@@ -226,9 +297,10 @@ env.Program("t_bloom",
     #"test/checkpoint/workers.c"],
     #LIBS=[wtlib])
 
-env.Program("t_huge",
+t = env.Program("t_huge",
     "test/huge/huge.c",
-    LIBS=[wtlib])
+    LIBS=[wtlib] + wtlibs)
+Default(t)
 
 #env.Program("t_fops",
     #["test/fops/file.c",
@@ -241,7 +313,7 @@ if useBdb:
 
     benv.Append(CPPDEFINES=['BERKELEY_DB_PATH=\\"' + useBdb.replace("\\", "\\\\") + '\\"'])
 
-    benv.Program("t_format",
+    t = benv.Program("t_format",
         ["test/format/backup.c",
         "test/format/bdb.c",
         "test/format/bulk.c",
@@ -252,7 +324,8 @@ if useBdb:
         "test/format/t.c",
         "test/format/util.c",
         "test/format/wts.c"],
-         LIBS=[wtlib, shim, "libdb61"])
+         LIBS=[wtlib, shim, "libdb61"] + wtlibs)
+    Default(t)
 
 #env.Program("t_thread",
     #["test/thread/file.c",
@@ -265,13 +338,14 @@ if useBdb:
     #["test/salvage/salvage.c"],
     #LIBS=[wtlib])
 
-env.Program("wtperf", [
+t = env.Program("wtperf", [
     "bench/wtperf/config.c",
     "bench/wtperf/misc.c",
     "bench/wtperf/track.c",
     "bench/wtperf/wtperf.c",
     ],
-    LIBS=[wtlib, shim] )
+    LIBS=[wtlib, shim]  + wtlibs)
+Default(t)
 
 examples = [
     "ex_access",
@@ -293,9 +367,52 @@ examples = [
     "ex_thread",
     ]
 
+# WiredTiger Smoke Test suppor
+# Runs each test in a custom temporary directory
+#
+def run_smoke_test(x):
+    print "Running Smoke Test: " + x
+
+    # Make temp dir
+    temp_dir = tempfile.mkdtemp(prefix="wt_home")
+
+    try:
+        # Set WT_HOME environment variable for test
+        os.environ["WIREDTIGER_HOME"] = temp_dir
+
+        # Run the test
+        ret = subprocess.call(x);
+        if( ret != 0):
+            sys.stderr.write("Bad exit code %d\n" % (ret))
+            raise Exception()
+
+    finally:
+        # Clean directory
+        #
+        shutil.rmtree(temp_dir)
+
+def builder_smoke_test(target, source, env):
+    run_smoke_test(source[0].abspath)
+    return None
+
+env.Append(BUILDERS={'SmokeTest' : Builder(action = builder_smoke_test)})
+
 for ex in examples:
-    if(ex in ['ex_async', 'ex_thread']):
-        env.Program(ex, "examples/c/" + ex + ".c", LIBS=[wtlib, shim])
+    if(ex in ['ex_all', 'ex_async', 'ex_thread']):
+        exp = env.Program(ex, "examples/c/" + ex + ".c", LIBS=[wtlib, shim] + wtlibs)
+        Default(exp)
+        env.Alias("check", env.SmokeTest(exp))
     else:
-        env.Program(ex, "examples/c/" + ex + ".c", LIBS=[wtlib])
+        exp = env.Program(ex, "examples/c/" + ex + ".c", LIBS=[wtdll[1]] + wtlibs)
+        Default(exp)
+        if not ex == 'ex_log':
+            env.Alias("check", env.SmokeTest(exp))
 
+# Install Target
+#
+prefix = GetOption("prefix")
+env.Alias("install", env.Install(os.path.join(prefix, "bin"), wtbin))
+env.Alias("install", env.Install(os.path.join(prefix, "bin"), wtdll[0])) # Just the dll
+env.Alias("install", env.Install(os.path.join(prefix, "include"), wtheader))
+env.Alias("install", env.Install(os.path.join(prefix, "lib"), wtdll[1])) # Just the import lib
+env.Alias("install", env.Install(os.path.join(prefix, "lib"), wtlib))
diff --git a/src/third_party/wiredtiger/build_win/wiredtiger.def b/src/third_party/wiredtiger/build_win/wiredtiger.def
new file mode 100644
index 00000000000..02884e4fd65
--- /dev/null
+++ b/src/third_party/wiredtiger/build_win/wiredtiger.def
@@ -0,0 +1,21 @@
+LIBRARY WIREDTIGER
+EXPORTS
+    wiredtiger_config_parser_open
+    wiredtiger_open
+    wiredtiger_pack_close
+    wiredtiger_pack_int
+    wiredtiger_pack_item
+    wiredtiger_pack_start
+    wiredtiger_pack_str
+    wiredtiger_pack_uint
+    wiredtiger_strerror
+    wiredtiger_strerror_r
+    wiredtiger_struct_pack
+    wiredtiger_struct_size
+    wiredtiger_struct_unpack
+    wiredtiger_unpack_int
+    wiredtiger_unpack_item
+    wiredtiger_unpack_start
+    wiredtiger_unpack_str
+    wiredtiger_unpack_uint
+    wiredtiger_version
diff --git a/src/third_party/wiredtiger/dist/api_data.py b/src/third_party/wiredtiger/dist/api_data.py
index 7754a3a1d13..65af833c4a2 100644
--- a/src/third_party/wiredtiger/dist/api_data.py
+++ b/src/third_party/wiredtiger/dist/api_data.py
@@ -241,6 +241,12 @@ file_config = format_meta + [
         minimum gain before prefix compression will be used on row-store
         leaf pages''',
         min=0),
+    Config('split_deepen_min_child', '0', r'''
+        minimum entries in a page to consider deepening the tree''',
+        type='int', undoc=True),
+    Config('split_deepen_per_child', '0', r'''
+        entries allocated per child when deepening the tree''',
+        type='int', undoc=True),
     Config('split_pct', '75', r'''
         the Btree page split size as a percentage of the maximum Btree
         page size, that is, when a Btree page is split, it will be
diff --git a/src/third_party/wiredtiger/dist/s_all b/src/third_party/wiredtiger/dist/s_all
index b63ed314453..96e69ddff04 100644
--- a/src/third_party/wiredtiger/dist/s_all
+++ b/src/third_party/wiredtiger/dist/s_all
@@ -66,6 +66,7 @@ run "sh ./s_tags" "building tags files"
 
 run "sh ./s_copyright" "checking copyright notices"
 run "sh ./s_define" "checking for unused #defines"
+run "sh ./s_export" "checking external symbol names"
 run "sh ./s_funcs" "checking for unused functions"
 run "sh ./s_getopt" "checking for incorrect getopt usage"
 run "sh ./s_lang" "checking for SWIG generated name conflicts"
@@ -74,7 +75,6 @@ run "sh ./s_stat" "checking for unused statistics fields"
 run "sh ./s_string" "checking string spelling"
 run "python style.py" "checking style (pass 1)"
 run "sh ./s_style" "checking style (pass 2)"
-run "sh ./s_symbols" "checking external symbol names"
 run "sh ./s_typedef -c" "checking for unused typedefs"
 run "sh ./s_whitespace" "checking whitespace"
 run "sh ./s_win" "checking windows config"
diff --git a/src/third_party/wiredtiger/dist/s_define.list b/src/third_party/wiredtiger/dist/s_define.list
index 7803b628917..91fbc971afa 100644
--- a/src/third_party/wiredtiger/dist/s_define.list
+++ b/src/third_party/wiredtiger/dist/s_define.list
@@ -34,11 +34,14 @@ WT_ATOMIC_SUB2
 WT_BARRIER
 WT_BLOCK_DESC_SIZE
 WT_CACHE_LINE_ALIGNMENT
+WT_COMPILER_TYPE_ALIGN
 WT_CONN_CHECK_PANIC
 WT_DEADLOCK
 WT_DEBUG_BYTE
 WT_HANDLE_CLOSED
 WT_HANDLE_NULLABLE
+WT_PACKED_STRUCT_BEGIN
+WT_PACKED_STRUCT_END
 WT_READ_BARRIER
 WT_REF_SIZE
 WT_SPINLOCK_MAX
diff --git a/src/third_party/wiredtiger/dist/s_symbols b/src/third_party/wiredtiger/dist/s_export
index e590ab6f62c..1212b5b2c1f 100644
--- a/src/third_party/wiredtiger/dist/s_symbols
+++ b/src/third_party/wiredtiger/dist/s_export
@@ -23,7 +23,7 @@ esac
 
 check()
 {
-	(sed -e '/^#/d' s_symbols.list &&
+	(sed -e '/^#/d' s_export.list &&
 	eval $NM |
 	sed 's/.* //' |
 	egrep -v '^__wt') |
diff --git a/src/third_party/wiredtiger/dist/s_symbols.list b/src/third_party/wiredtiger/dist/s_export.list
index 8f469e94433..8f469e94433 100644
--- a/src/third_party/wiredtiger/dist/s_symbols.list
+++ b/src/third_party/wiredtiger/dist/s_export.list
diff --git a/src/third_party/wiredtiger/dist/s_prototypes b/src/third_party/wiredtiger/dist/s_prototypes
index f29b96a1f55..603c0f5633d 100755
--- a/src/third_party/wiredtiger/dist/s_prototypes
+++ b/src/third_party/wiredtiger/dist/s_prototypes
@@ -31,7 +31,7 @@ for i in `sed -e '/^[a-z]/!d' filelist`; do
 	    -e 's/\* /\*/g' \
 	    -e 's/  */ /g' \
 	    -e 's/^/extern /' \
-	    -e 's/WT_GCC_FUNC_/WT_GCC_/' \
+	    -e 's/WT_GCC_FUNC_/WT_GCC_FUNC_DECL_/' \
 	    -e 's/$/;/p' \
 	    < ../$i
 done) > $t
diff --git a/src/third_party/wiredtiger/dist/s_string.ok b/src/third_party/wiredtiger/dist/s_string.ok
index cea96db2848..1658684313c 100644
--- a/src/third_party/wiredtiger/dist/s_string.ok
+++ b/src/third_party/wiredtiger/dist/s_string.ok
@@ -881,6 +881,7 @@ poptable
 pos
 posint
 posix
+pragmas
 pre
 prealloc
 preload
diff --git a/src/third_party/wiredtiger/dist/s_typedef b/src/third_party/wiredtiger/dist/s_typedef
index 6b230223baa..2e206757f48 100644..100755
--- a/src/third_party/wiredtiger/dist/s_typedef
+++ b/src/third_party/wiredtiger/dist/s_typedef
@@ -20,8 +20,12 @@ build() {
 
 	l=`ls ../src/include/*.[hi] ../src/include/*.in |
 	    sed -e '/wiredtiger.*/d' -e '/queue.h/d'`
-	egrep -h '^[ 	]*(struct|union)[	 ]*__.*[	 ]*{' $l | \
-	    sed -e 's/^[	 ]*//' -e 's/[	 ]*{.*//' | sort | \
+	egrep -h \
+	    '^[	 ]*(((struct|union)[	 ].*__wt_.*{)|WT_PACKED_STRUCT_BEGIN)' \
+	    $l |
+	    sed -e 's/WT_PACKED_STRUCT_BEGIN(\(.*\))/struct \1 {/' \
+	        -e 's/WT_COMPILER_TYPE_ALIGN(.*)[ ]*//' \
+	        -e 's/^[	 ]*//' -e 's/[	 ]*{.*//' | sort | \
 	while read t n; do
 		upper=`echo $n | sed -e 's/^__//' | tr [a-z] [A-Z]`
 		echo "$t $n;"
diff --git a/src/third_party/wiredtiger/dist/s_win b/src/third_party/wiredtiger/dist/s_win
index 187de91e498..cdfc71a8a1e 100755
--- a/src/third_party/wiredtiger/dist/s_win
+++ b/src/third_party/wiredtiger/dist/s_win
@@ -26,6 +26,19 @@ win_config()
 	}
 }
 
+win_export()
+{
+	# Build the Windows list of exported symbols.
+	f='../build_win/wiredtiger.def'
+	(echo 'LIBRARY WIREDTIGER'
+	 echo 'EXPORTS'
+	 sed -e '/^$/d' \
+	     -e '/^#/d' \
+	     -e 's/^/    /') < s_export.list > $t
+	 cmp $t $f > /dev/null 2>&1 ||
+	     (echo "Building $f" && rm -f $f && cp $t $f)
+}
+
 win_filelist()
 {
 	f='../build_win/filelist.win'
@@ -65,6 +78,7 @@ win_filelist()
 }
 
 win_config
+win_export
 win_filelist
 
 exit 0
diff --git a/src/third_party/wiredtiger/dist/serial.py b/src/third_party/wiredtiger/dist/serial.py
deleted file mode 100644
index ddadbbdb6be..00000000000
--- a/src/third_party/wiredtiger/dist/serial.py
+++ /dev/null
@@ -1,189 +0,0 @@
-# Output serialization functions.
-
-import textwrap
-from dist import compare_srcfile
-
-class SerialArg:
-    def __init__(self, typestr, name, sized=0):
-        self.typestr = typestr
-        self.name = name
-        self.sized = sized
-
-class Serial:
-    def __init__(self, name, args):
-        self.name = name
-        self.args = args
-
-msgtypes = [
-Serial('col_append', [
-        SerialArg('WT_INSERT_HEAD *', 'ins_head'),
-        SerialArg('WT_INSERT ***', 'ins_stack'),
-        SerialArg('WT_INSERT *', 'new_ins', 1),
-        SerialArg('uint64_t *', 'recnop'),
-        SerialArg('u_int', 'skipdepth'),
-    ]),
-
-Serial('insert', [
-        SerialArg('WT_INSERT_HEAD *', 'ins_head'),
-        SerialArg('WT_INSERT ***', 'ins_stack'),
-        SerialArg('WT_INSERT *', 'new_ins', 1),
-        SerialArg('u_int', 'skipdepth'),
-    ]),
-
-Serial('update', [
-        SerialArg('WT_UPDATE **', 'srch_upd'),
-        SerialArg('WT_UPDATE *', 'upd', 1),
-    ]),
-]
-
-# decl --
-#    Return a declaration for the variable.
-def decl(l):
-    o = l.typestr
-    if o[-1] != '*':
-        o += ' '
-    return o + l.name
-
-# decl_p --
-#    Return a declaration for a reference to the variable, which requires
-# another level of indirection.
-def decl_p(l):
-    o = l.typestr
-    if o[-1] != '*':
-        o += ' '
-    return o + '*' + l.name + 'p'
-
-# output --
-#    Create serialized function calls.
-def output(entry, f):
-    # Function declaration.
-    f.write('static inline int\n__wt_' + entry.name + '_serial(\n')
-    o = 'WT_SESSION_IMPL *session, WT_PAGE *page'
-    for l in entry.args:
-        if l.sized:
-            o += ', ' + decl_p(l) + ', size_t ' + l.name + '_size'
-        else:
-            o += ', ' + decl(l)
-    o += ')'
-    f.write('\n'.join('\t' + l for l in textwrap.wrap(o, 70)))
-    f.write('\n{')
-
-    # Local variable declarations.
-    for l in entry.args:
-        if l.sized:
-            f.write('''
-\t''' + decl(l) + ''' = *''' + l.name + '''p;
-\tWT_DECL_RET;
-\tsize_t incr_mem;
-''')
-
-    # Clear memory references we now own.
-    for l in entry.args:
-        if l.sized:
-            f.write('''
-\t/* Clear references to memory we now own. */
-\t*''' + l.name + '''p = NULL;
-''')
-
-    # Check the page write generation hasn't wrapped.
-    f.write('''
-\t/*
-\t * Check to see if the page's write generation is about to wrap (wildly
-\t * unlikely as it implies 4B updates between clean page reconciliations,
-\t * but technically possible), and fail the update.
-\t *
-\t * The check is outside of the serialization mutex because the page's
-\t * write generation is going to be a hot cache line, so technically it's
-\t * possible for the page's write generation to wrap between the test and
-\t * our subsequent modification of it.  However, the test is (4B-1M), and
-\t * there cannot be a million threads that have done the test but not yet
-\t * completed their modification.
-\t */
-\t WT_RET(__page_write_gen_wrapped_check(page));
-''')
-
-    # Call the worker function.
-    if entry.name != "update":
-        f.write('''
-\t/* Acquire the page's spinlock, call the worker function. */
-\tWT_PAGE_LOCK(session, page);''')
-
-    f.write('''
-\tret = __''' + entry.name + '''_serial_func(
-''')
-    o = 'session'
-    if entry.name == "update":
-        o += ', page'
-    for l in entry.args:
-        o += ', ' + l.name
-    o += ');'
-    f.write('\n'.join('\t    ' + l for l in textwrap.wrap(o, 70)))
-
-    if entry.name != "update":
-        f.write('''
-\tWT_PAGE_UNLOCK(session, page);''')
-
-    f.write('''
-
-\t/* Free unused memory on error. */
-\tif (ret != 0) {
-''')
-    for l in entry.args:
-        if not l.sized:
-            continue
-        f.write(
-            '\t\t__wt_free(session, ' + l.name + ');\n')
-    f.write('''
-\t\treturn (ret);
-\t}
-''')
-
-    f.write('''
-\t/*
-\t * Increment in-memory footprint after releasing the mutex: that's safe
-\t * because the structures we added cannot be discarded while visible to
-\t * any running transaction, and we're a running transaction, which means
-\t * there can be no corresponding delete until we complete.
-\t */
-\tincr_mem = 0;
-''')
-    for l in entry.args:
-        if not l.sized:
-            continue
-        f.write('\tWT_ASSERT(session, ' +
-            l.name + '_size != 0);\n')
-        f.write('\tincr_mem += ' + l.name + '_size;\n')
-    f.write('''\tif (incr_mem != 0)
-\t\t__wt_cache_page_inmem_incr(session, page, incr_mem);
-
-\t/* Mark the page dirty after updating the footprint. */
-\t__wt_page_modify_set(session, page);
-
-\treturn (0);
-}
-
-''')
-
-#####################################################################
-# Update serial.i.
-#####################################################################
-tmp_file = '__tmp'
-tfile = open(tmp_file, 'w')
-skip = 0
-for line in open('../src/include/serial.i', 'r'):
-    if not skip:
-        tfile.write(line)
-    if line.count('Serialization function section: END'):
-        tfile.write(line)
-        skip = 0
-    elif line.count('Serialization function section: BEGIN'):
-        tfile.write(' */\n\n')
-        skip = 1
-
-        for entry in msgtypes:
-            output(entry, tfile)
-
-        tfile.write('/*\n')
-
-tfile.close()
-compare_srcfile(tmp_file, '../src/include/serial.i')
diff --git a/src/third_party/wiredtiger/src/btree/bt_cursor.c b/src/third_party/wiredtiger/src/btree/bt_cursor.c
index 704b258a7dd..1960e4605ef 100644
--- a/src/third_party/wiredtiger/src/btree/bt_cursor.c
+++ b/src/third_party/wiredtiger/src/btree/bt_cursor.c
@@ -782,7 +782,9 @@ __wt_btcur_next_random(WT_CURSOR_BTREE *cbt)
 
 	WT_RET(__cursor_func_init(cbt, 1));
 
-	WT_ERR(__wt_row_random(session, cbt));
+	WT_WITH_PAGE_INDEX(session,
+	    ret = __wt_row_random(session, cbt));
+	WT_ERR(ret);
 	if (__cursor_valid(cbt, &upd))
 		WT_ERR(__wt_kv_return(session, cbt, upd));
 	else
@@ -948,7 +950,11 @@ __cursor_truncate(WT_SESSION_IMPL *session,
 	} else {
 		do {
 			WT_RET(__wt_btcur_remove(start));
-			for (;;) {
+			/*
+			 * Reset ret each time through so that we don't loop
+			 * forever in the cursor equals case.
+			 */
+			for (ret = 0;;) {
 				if (stop != NULL &&
 				    __cursor_equals(start, stop))
 					break;
@@ -1009,7 +1015,11 @@ __cursor_truncate_fix(WT_SESSION_IMPL *session,
 	} else {
 		do {
 			WT_RET(__wt_btcur_remove(start));
-			for (;;) {
+			/*
+			 * Reset ret each time through so that we don't loop
+			 * forever in the cursor equals case.
+			 */
+			for (ret = 0;;) {
 				if (stop != NULL &&
 				    __cursor_equals(start, stop))
 					break;
diff --git a/src/third_party/wiredtiger/src/btree/bt_debug.c b/src/third_party/wiredtiger/src/btree/bt_debug.c
index af9f6a669f2..e84a63695f9 100644
--- a/src/third_party/wiredtiger/src/btree/bt_debug.c
+++ b/src/third_party/wiredtiger/src/btree/bt_debug.c
@@ -48,7 +48,7 @@ static void __debug_row_skip(WT_DBG *, WT_INSERT_HEAD *);
 static int  __debug_tree(WT_SESSION_IMPL *, WT_PAGE *, const char *, uint32_t);
 static void __debug_update(WT_DBG *, WT_UPDATE *, int);
 static void __dmsg(WT_DBG *, const char *, ...)
-	WT_GCC_ATTRIBUTE((format (printf, 2, 3)));
+	WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 2, 3)));
 static void __dmsg_wrapup(WT_DBG *);
 
 /*
@@ -548,7 +548,9 @@ __debug_page(WT_DBG *ds, WT_PAGE *page, uint32_t flags)
 	session = ds->session;
 
 	/* Dump the page metadata. */
-	WT_RET(__debug_page_metadata(ds, page));
+	WT_WITH_PAGE_INDEX(session,
+	    ret = __debug_page_metadata(ds, page));
+	WT_RET(ret);
 
 	/* Dump the page. */
 	switch (page->type) {
diff --git a/src/third_party/wiredtiger/src/btree/bt_handle.c b/src/third_party/wiredtiger/src/btree/bt_handle.c
index f0414c4e855..b47c9c897a6 100644
--- a/src/third_party/wiredtiger/src/btree/bt_handle.c
+++ b/src/third_party/wiredtiger/src/btree/bt_handle.c
@@ -12,7 +12,7 @@ static int __btree_conf(WT_SESSION_IMPL *, WT_CKPT *ckpt);
 static int __btree_get_last_recno(WT_SESSION_IMPL *);
 static int __btree_page_sizes(WT_SESSION_IMPL *);
 static int __btree_preload(WT_SESSION_IMPL *);
-static int __btree_tree_open_empty(WT_SESSION_IMPL *, int, int);
+static int __btree_tree_open_empty(WT_SESSION_IMPL *, int);
 
 /*
  * __wt_btree_open --
@@ -100,8 +100,7 @@ __wt_btree_open(WT_SESSION_IMPL *session, const char *op_cfg[])
 		    ckpt.raw.data, ckpt.raw.size,
 		    root_addr, &root_addr_size, readonly));
 		if (creation || root_addr_size == 0)
-			WT_ERR(__btree_tree_open_empty(
-			    session, creation, readonly));
+			WT_ERR(__btree_tree_open_empty(session, creation));
 		else {
 			WT_ERR(__wt_btree_tree_open(
 			    session, root_addr, root_addr_size));
@@ -391,16 +390,17 @@ err:		__wt_buf_free(session, &dsk);
  *	Create an empty in-memory tree.
  */
 static int
-__btree_tree_open_empty(WT_SESSION_IMPL *session, int creation, int readonly)
+__btree_tree_open_empty(WT_SESSION_IMPL *session, int creation)
 {
 	WT_BTREE *btree;
 	WT_DECL_RET;
-	WT_PAGE *root, *leaf;
+	WT_PAGE *leaf, *root;
 	WT_PAGE_INDEX *pindex;
 	WT_REF *ref;
 
 	btree = S2BT(session);
 	root = leaf = NULL;
+	ref = NULL;
 
 	/*
 	 * Newly created objects can be used for cursor inserts or for bulk
@@ -414,13 +414,10 @@ __btree_tree_open_empty(WT_SESSION_IMPL *session, int creation, int readonly)
 	}
 
 	/*
-	 * A note about empty trees: the initial tree is a root page and a leaf
-	 * page.  We need a pair of pages instead of just a single page because
-	 * we can reconcile the leaf page while the root stays pinned in memory.
-	 * If the pair is evicted without being modified, that's OK, nothing is
-	 * ever written.
-	 *
-	 * Create the root and leaf pages.
+	 * A note about empty trees: the initial tree is a single root page.
+	 * It has a single reference to a leaf page, marked deleted.  The leaf
+	 * page will be created by the first update.  If the root is evicted
+	 * without being modified, that's OK, nothing is ever written.
 	 *
 	 * !!!
 	 * Be cautious about changing the order of updates in this code: to call
@@ -437,10 +434,9 @@ __btree_tree_open_empty(WT_SESSION_IMPL *session, int creation, int readonly)
 		pindex = WT_INTL_INDEX_COPY(root);
 		ref = pindex->index[0];
 		ref->home = root;
-		WT_ERR(__wt_btree_new_leaf_page(session, &leaf));
-		ref->page = leaf;
+		ref->page = NULL;
 		ref->addr = NULL;
-		ref->state = WT_REF_MEM;
+		ref->state = WT_REF_DELETED;
 		ref->key.recno = 1;
 		break;
 	case BTREE_ROW:
@@ -451,48 +447,20 @@ __btree_tree_open_empty(WT_SESSION_IMPL *session, int creation, int readonly)
 		pindex = WT_INTL_INDEX_COPY(root);
 		ref = pindex->index[0];
 		ref->home = root;
-		WT_ERR(__wt_btree_new_leaf_page(session, &leaf));
-		ref->page = leaf;
+		ref->page = NULL;
 		ref->addr = NULL;
-		ref->state = WT_REF_MEM;
+		ref->state = WT_REF_DELETED;
 		WT_ERR(__wt_row_ikey_incr(
 		    session, root, 0, "", 1, &ref->key.ikey));
 		break;
 	WT_ILLEGAL_VALUE_ERR(session);
 	}
 
-	/*
-	 * Mark the leaf page dirty: we didn't create an entirely valid root
-	 * page (specifically, the root page's disk address isn't set, and it's
-	 * the act of reconciling the leaf page that makes it work, we don't
-	 * try and use the original disk address of modified pages).  We could
-	 * get around that by leaving the leaf page clean and building a better
-	 * root page, but then we get into trouble because a checkpoint marks
-	 * the root page dirty to force a write, and without reconciling the
-	 * leaf page we won't realize there's no records to write, we'll write
-	 * a root page, which isn't correct for an empty tree.
-	 *
-	 * Earlier versions of this code kept the leaf page clean, but with the
-	 * "empty" flag set in the leaf page's modification structure; in that
-	 * case, checkpoints works (forced reconciliation of a root with a
-	 * single "empty" page wouldn't write any blocks). That version had
-	 * memory leaks because the eviction code didn't correctly handle pages
-	 * that were "clean" (and so never reconciled), yet "modified" with an
-	 * "empty" flag.  The goal of this code is to mimic a real tree that
-	 * simply has no records, for whatever reason, and trust reconciliation
-	 * to figure out it's empty and not write any blocks.
-	 *
-	 * We do not set the tree's modified flag because the checkpoint code
-	 * skips unmodified files in closing checkpoints (checkpoints that
-	 * don't require a write unless the file is actually dirty).  There's
-	 * no need to reconcile this file unless the application does a real
-	 * checkpoint or it's actually modified.
-	 *
-	 * Only do this for a live tree, not for checkpoints.  If we open an
-	 * empty checkpoint, the leaf page cannot be dirty or eviction may try
-	 * to write it, which will fail because checkpoints are read-only.
-	 */
-	if (!readonly) {
+	/* Bulk loads require a leaf page for reconciliation: create it now. */
+	if (F_ISSET(btree, WT_BTREE_BULK)) {
+		WT_ERR(__wt_btree_new_leaf_page(session, &leaf));
+		ref->page = leaf;
+		ref->state = WT_REF_MEM;
 		WT_ERR(__wt_page_modify_init(session, leaf));
 		__wt_page_only_modify_set(session, leaf);
 	}
@@ -676,6 +644,22 @@ __btree_page_sizes(WT_SESSION_IMPL *session)
 	leaf_split_size = __wt_split_page_size(btree, btree->maxleafpage);
 
 	/*
+	 * In-memory split configuration.
+	 */
+	if (__wt_config_gets(
+	    session, cfg, "split_deepen_min_child", &cval) == WT_NOTFOUND ||
+	    cval.val == 0)
+		btree->split_deepen_min_child = WT_SPLIT_DEEPEN_MIN_CHILD_DEF;
+	else
+		btree->split_deepen_min_child = (u_int)cval.val;
+	if (__wt_config_gets(
+	    session, cfg, "split_deepen_per_child", &cval) == WT_NOTFOUND ||
+	    cval.val == 0)
+		btree->split_deepen_per_child = WT_SPLIT_DEEPEN_PER_CHILD_DEF;
+	else
+		btree->split_deepen_per_child = (u_int)cval.val;
+
+	/*
 	 * Get the maximum internal/leaf page key/value sizes.
 	 *
 	 * In historic versions of WiredTiger, the maximum internal/leaf page
diff --git a/src/third_party/wiredtiger/src/btree/bt_huffman.c b/src/third_party/wiredtiger/src/btree/bt_huffman.c
index c1cf3431c3b..c31b3f2fdf1 100644
--- a/src/third_party/wiredtiger/src/btree/bt_huffman.c
+++ b/src/third_party/wiredtiger/src/btree/bt_huffman.c
@@ -128,6 +128,30 @@ static const struct __wt_huffman_table __wt_huffman_nytenglish[] = {
 static int __wt_huffman_read(WT_SESSION_IMPL *,
     WT_CONFIG_ITEM *, struct __wt_huffman_table **, u_int *, u_int *);
 
+#define	WT_HUFFMAN_CONFIG_VALID(str, len)				\
+	(WT_STRING_CASE_MATCH("english", (str), (len)) ||		\
+	    WT_PREFIX_MATCH((str), "utf8") || WT_PREFIX_MATCH((str), "utf16"))
+
+/*
+ * __btree_huffman_config --
+ *	Verify the key or value strings passed in.
+ */
+static int
+__btree_huffman_config(WT_SESSION_IMPL *session,
+    WT_CONFIG_ITEM *key_conf, WT_CONFIG_ITEM *value_conf)
+{
+	if (key_conf->len != 0 &&
+	    !WT_HUFFMAN_CONFIG_VALID(key_conf->str, key_conf->len))
+		WT_RET_MSG(
+		    session, EINVAL, "illegal Huffman key configuration");
+	if (value_conf->len != 0 &&
+	    !WT_HUFFMAN_CONFIG_VALID(value_conf->str, value_conf->len))
+		WT_RET_MSG(
+		    session, EINVAL, "illegal Huffman value configuration");
+	return (0);
+
+}
+
 /*
  * __wt_btree_huffman_open --
  *	Configure Huffman encoding for the tree.
@@ -150,6 +174,7 @@ __wt_btree_huffman_open(WT_SESSION_IMPL *session)
 	    __wt_config_gets_none(session, cfg, "huffman_value", &value_conf));
 	if (key_conf.len == 0 && value_conf.len == 0)
 		return (0);
+	WT_RET(__btree_huffman_config(session, &key_conf, &value_conf));
 
 	switch (btree->type) {		/* Check file type compatibility. */
 	case BTREE_COL_FIX:
@@ -311,6 +336,8 @@ __wt_huffman_read(WT_SESSION_IMPL *session, WT_CONFIG_ITEM *ip,
 		tp->frequency = (uint32_t)frequency;
 	}
 
+	if (ret == EOF)
+		ret = 0;
 	*entriesp = lineno - 1;
 	*tablep = table;
 
diff --git a/src/third_party/wiredtiger/src/btree/bt_page.c b/src/third_party/wiredtiger/src/btree/bt_page.c
index 561e1c19218..1e539b7caee 100644
--- a/src/third_party/wiredtiger/src/btree/bt_page.c
+++ b/src/third_party/wiredtiger/src/btree/bt_page.c
@@ -131,8 +131,8 @@ __wt_page_in_func(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t flags
 			    force_attempts < 10 &&
 			    __evict_force_check(session, page)) {
 				++force_attempts;
-				if ((ret = __wt_page_release_busy(
-				    session, ref, flags)) == EBUSY) {
+				ret = __wt_page_release_evict(session, ref);
+				if (ret == EBUSY) {
 					/* If forced eviction fails, stall. */
 					ret = 0;
 					wait_cnt += 1000;
@@ -285,6 +285,7 @@ err:			if ((pindex = WT_INTL_INDEX_COPY(page)) != NULL) {
 
 	/* Increment the cache statistics. */
 	__wt_cache_page_inmem_incr(session, page, size);
+	(void)WT_ATOMIC_ADD8(cache->bytes_read, size);
 	(void)WT_ATOMIC_ADD8(cache->pages_inmem, 1);
 
 	*pagep = page;
diff --git a/src/third_party/wiredtiger/src/btree/bt_slvg.c b/src/third_party/wiredtiger/src/btree/bt_slvg.c
index fbc3890f23b..1cf616a2f6b 100644
--- a/src/third_party/wiredtiger/src/btree/bt_slvg.c
+++ b/src/third_party/wiredtiger/src/btree/bt_slvg.c
@@ -294,12 +294,16 @@ __wt_bt_salvage(WT_SESSION_IMPL *session, WT_CKPT *ckptbase, const char *cfg[])
 		switch (ss->page_type) {
 		case WT_PAGE_COL_FIX:
 		case WT_PAGE_COL_VAR:
-			WT_ERR(
-			    __slvg_col_build_internal(session, leaf_cnt, ss));
+			WT_WITH_PAGE_INDEX(session,
+			    ret = __slvg_col_build_internal(
+			    session, leaf_cnt, ss));
+			WT_ERR(ret);
 			break;
 		case WT_PAGE_ROW_LEAF:
-			WT_ERR(
-			    __slvg_row_build_internal(session, leaf_cnt, ss));
+			WT_WITH_PAGE_INDEX(session,
+			    ret = __slvg_row_build_internal(
+			    session, leaf_cnt, ss));
+			WT_ERR(ret);
 			break;
 		}
 
diff --git a/src/third_party/wiredtiger/src/btree/bt_split.c b/src/third_party/wiredtiger/src/btree/bt_split.c
index e4fe51ea28f..05af1a2f885 100644
--- a/src/third_party/wiredtiger/src/btree/bt_split.c
+++ b/src/third_party/wiredtiger/src/btree/bt_split.c
@@ -8,17 +8,10 @@
 
 #include "wt_internal.h"
 
-/*
- * Track allocation increments, matching the cache calculations, which add an
- * estimate of allocation overhead to every object.
- */
-#define	WT_MEMSIZE_ADD(total, len)	do {				\
-	total += (len);							\
-} while (0)
-#define	WT_MEMSIZE_TRANSFER(from_decr, to_incr, len) do {		\
+#define	WT_MEM_TRANSFER(from_decr, to_incr, len) do {			\
 	size_t __len = (len);						\
-	WT_MEMSIZE_ADD(from_decr, __len);				\
-	WT_MEMSIZE_ADD(to_incr, __len);					\
+	from_decr += __len;						\
+	to_incr += __len;						\
 } while (0)
 
 /*
@@ -49,7 +42,8 @@ __split_oldest_gen(WT_SESSION_IMPL *session)
  *	Add a new entry into the session's split stash list.
  */
 static int
-__split_stash_add(WT_SESSION_IMPL *session, void *p, size_t len)
+__split_stash_add(
+    WT_SESSION_IMPL *session, uint64_t split_gen, void *p, size_t len)
 {
 	WT_SPLIT_STASH *stash;
 
@@ -60,7 +54,7 @@ __split_stash_add(WT_SESSION_IMPL *session, void *p, size_t len)
 	    session->split_stash_cnt + 1, &session->split_stash));
 
 	stash = session->split_stash + session->split_stash_cnt++;
-	stash->split_gen = WT_ATOMIC_ADD8(S2C(session)->split_gen, 1);
+	stash->split_gen = split_gen;
 	stash->p = p;
 	stash->len = len;
 
@@ -150,14 +144,14 @@ __wt_split_stash_discard_all(
  *	it to be freed otherwise.
  */
 static int
-__split_safe_free(WT_SESSION_IMPL *session, int exclusive, void *p, size_t s)
+__split_safe_free(WT_SESSION_IMPL *session,
+    uint64_t split_gen, int exclusive, void *p, size_t s)
 {
 	/*
 	 * We have swapped something in a page: if we don't have exclusive
 	 * access, check whether there are other threads in the same tree.
 	 */
-	if (!exclusive &&
-	    __split_oldest_gen(session) == S2C(session)->split_gen + 1)
+	if (!exclusive && __split_oldest_gen(session) > split_gen)
 		exclusive = 1;
 
 	if (exclusive) {
@@ -165,17 +159,10 @@ __split_safe_free(WT_SESSION_IMPL *session, int exclusive, void *p, size_t s)
 		return (0);
 	}
 
-	return (__split_stash_add(session, p, s));
+	return (__split_stash_add(session, split_gen, p, s));
 }
 
 /*
- * Tuning; global variables to allow the binary to be patched, we don't yet have
- * any real understanding of what might be useful to surface to applications.
- */
-static u_int __split_deepen_min_child = 10000;
-static u_int __split_deepen_per_child = 100;
-
-/*
  * __split_should_deepen --
  *	Return if we should deepen the tree.
  */
@@ -183,11 +170,13 @@ static int
 __split_should_deepen(
     WT_SESSION_IMPL *session, WT_REF *ref, uint32_t *childrenp)
 {
-	WT_PAGE_INDEX *pindex;
+	WT_BTREE *btree;
 	WT_PAGE *page;
+	WT_PAGE_INDEX *pindex;
 
 	*childrenp = 0;
 
+	btree = S2BT(session);
 	page = ref->page;
 	pindex = WT_INTL_INDEX_COPY(page);
 
@@ -204,8 +193,8 @@ __split_should_deepen(
 	 * we get a significant payback (in the case of a set of large keys,
 	 * splitting won't help).
 	 */
-	if (pindex->entries > __split_deepen_min_child) {
-		*childrenp = pindex->entries / __split_deepen_per_child;
+	if (pindex->entries > btree->split_deepen_min_child) {
+		*childrenp = pindex->entries / btree->split_deepen_per_child;
 		return (1);
 	}
 
@@ -296,10 +285,9 @@ __split_ref_deepen_move(WT_SESSION_IMPL *session,
 			ref->key.ikey = ikey;
 		} else {
 			WT_RET(__split_ovfl_key_cleanup(session, parent, ref));
-			WT_MEMSIZE_ADD(*parent_decrp,
-			    sizeof(WT_IKEY) + ikey->size);
+			*parent_decrp += sizeof(WT_IKEY) + ikey->size;
 		}
-		WT_MEMSIZE_ADD(*child_incrp, sizeof(WT_IKEY) + ikey->size);
+		*child_incrp += sizeof(WT_IKEY) + ikey->size;
 	}
 
 	/*
@@ -323,7 +311,7 @@ __split_ref_deepen_move(WT_SESSION_IMPL *session,
 	}
 
 	/* And finally, the WT_REF itself. */
-	WT_MEMSIZE_TRANSFER(*parent_decrp, *child_incrp, sizeof(WT_REF));
+	WT_MEM_TRANSFER(*parent_decrp, *child_incrp, sizeof(WT_REF));
 
 	return (0);
 }
@@ -393,6 +381,7 @@ __split_deepen(WT_SESSION_IMPL *session, WT_PAGE *parent, uint32_t children)
 	WT_REF **alloc_refp;
 	WT_REF *child_ref, **child_refp, *parent_ref, **parent_refp, *ref;
 	size_t child_incr, parent_decr, parent_incr, size;
+	uint64_t split_gen;
 	uint32_t chunk, i, j, remain, slots;
 	int panic;
 	void *p;
@@ -432,7 +421,7 @@ __split_deepen(WT_SESSION_IMPL *session, WT_PAGE *parent, uint32_t children)
 	size = sizeof(WT_PAGE_INDEX) +
 	    (children + SPLIT_CORRECT_2) * sizeof(WT_REF *);
 	WT_ERR(__wt_calloc(session, 1, size, &alloc_index));
-	WT_MEMSIZE_ADD(parent_incr, size);
+	parent_incr += size;
 	alloc_index->index = (WT_REF **)(alloc_index + 1);
 	alloc_index->entries = children + SPLIT_CORRECT_2;
 	alloc_index->index[0] = pindex->index[0];
@@ -441,7 +430,7 @@ __split_deepen(WT_SESSION_IMPL *session, WT_PAGE *parent, uint32_t children)
 	for (alloc_refp = alloc_index->index + SPLIT_CORRECT_1,
 	    i = 0; i < children; ++alloc_refp, ++i) {
 		WT_ERR(__wt_calloc_one(session, alloc_refp));
-		WT_MEMSIZE_ADD(parent_incr, sizeof(WT_REF));
+		parent_incr += sizeof(WT_REF);
 	}
 
 	/* Allocate child pages, and connect them into the new page index. */
@@ -466,7 +455,7 @@ __split_deepen(WT_SESSION_IMPL *session, WT_PAGE *parent, uint32_t children)
 			__wt_ref_key(parent, *parent_refp, &p, &size);
 			WT_ERR(
 			    __wt_row_ikey(session, 0, p, size, &ref->key.ikey));
-			WT_MEMSIZE_ADD(parent_incr, sizeof(WT_IKEY) + size);
+			parent_incr += sizeof(WT_IKEY) + size;
 		} else
 			ref->key.recno = (*parent_refp)->key.recno;
 		ref->state = WT_REF_MEM;
@@ -527,6 +516,7 @@ __split_deepen(WT_SESSION_IMPL *session, WT_PAGE *parent, uint32_t children)
 	 * needs to be paid.
 	 */
 	WT_INTL_INDEX_SET(parent, alloc_index);
+	split_gen = WT_ATOMIC_ADD8(S2C(session)->split_gen, 1);
 	panic = 1;
 
 #ifdef HAVE_DIAGNOSTIC
@@ -596,31 +586,14 @@ __split_deepen(WT_SESSION_IMPL *session, WT_PAGE *parent, uint32_t children)
 	 * be using the new index.
 	 */
 	size = sizeof(WT_PAGE_INDEX) + pindex->entries * sizeof(WT_REF *);
-	WT_ERR(__split_safe_free(session, 0, pindex, size));
-	WT_MEMSIZE_ADD(parent_decr, size);
+	WT_ERR(__split_safe_free(session, split_gen, 0, pindex, size));
+	parent_decr += size;
 
-#if 0
 	/*
-	 * Adjust the parent's memory footprint.  This may look odd, but we
-	 * have already taken the allocation overhead into account, and an
-	 * increment followed by a decrement will cancel out the normal
-	 * adjustment.
+	 * Adjust the parent's memory footprint.
 	 */
 	__wt_cache_page_inmem_incr(session, parent, parent_incr);
 	__wt_cache_page_inmem_decr(session, parent, parent_decr);
-#else
-	/*
-	 * XXX
-	 * The code to track page sizes is fundamentally flawed in the face of
-	 * splits: for example, we don't add in an overhead allocation constant
-	 * when allocating WT_REF structures as pages are created, but the
-	 * calculations during split assume that correction. For now, ignore
-	 * our carefully calculated values and force the internal page size to
-	 * 5% of its current value.
-	 */
-	size = parent->memory_footprint - (parent->memory_footprint / 20);
-	__wt_cache_page_inmem_decr(session, parent, size);
-#endif
 
 	if (0) {
 err:		__wt_free_ref_index(session, parent, alloc_index, 1);
@@ -753,11 +726,10 @@ __wt_multi_to_ref(WT_SESSION_IMPL *session,
 	incr = 0;
 
 	/* In some cases, the underlying WT_REF has not yet been allocated. */
-	if (*refp == NULL) {
+	if (*refp == NULL)
 		WT_RET(__wt_calloc_one(session, refp));
-		WT_MEMSIZE_ADD(incr, sizeof(WT_REF));
-	}
 	ref = *refp;
+	incr += sizeof(WT_REF);
 
 	/*
 	 * Any parent reference must be filled in by our caller; the primary
@@ -790,7 +762,7 @@ __wt_multi_to_ref(WT_SESSION_IMPL *session,
 		ikey = multi->key.ikey;
 		WT_RET(__wt_row_ikey(session, 0,
 		    WT_IKEY_DATA(ikey), ikey->size, &ref->key.ikey));
-		WT_MEMSIZE_ADD(incr, sizeof(WT_IKEY) + ikey->size);
+		incr += sizeof(WT_IKEY) + ikey->size;
 		break;
 	default:
 		ref->key.recno = multi->key.recno;
@@ -815,7 +787,7 @@ __wt_multi_to_ref(WT_SESSION_IMPL *session,
 static int
 __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
     uint32_t new_entries, size_t parent_decr, size_t parent_incr,
-    int exclusive, int ref_discard)
+    int exclusive, int ref_discard, uint64_t *split_genp)
 {
 	WT_DECL_RET;
 	WT_IKEY *ikey;
@@ -823,6 +795,7 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 	WT_PAGE_INDEX *alloc_index, *pindex;
 	WT_REF **alloc_refp, *next_ref, *parent_ref;
 	size_t size;
+	uint64_t split_gen;
 	uint32_t children, i, j;
 	uint32_t deleted_entries, parent_entries, result_entries;
 	int complete, hazard, locked;
@@ -902,7 +875,7 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 	 */
 	size = sizeof(WT_PAGE_INDEX) + result_entries * sizeof(WT_REF *);
 	WT_ERR(__wt_calloc(session, 1, size, &alloc_index));
-	WT_MEMSIZE_ADD(parent_incr, size);
+	parent_incr += size;
 	alloc_index->index = (WT_REF **)(alloc_index + 1);
 	alloc_index->entries = result_entries;
 	for (alloc_refp = alloc_index->index, i = 0; i < parent_entries; ++i) {
@@ -929,6 +902,7 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 	 * to threads descending the tree.
 	 */
 	WT_INTL_INDEX_SET(parent, alloc_index);
+	split_gen = *split_genp = WT_ATOMIC_ADD8(S2C(session)->split_gen, 1);
 	alloc_index = NULL;
 
 #ifdef HAVE_DIAGNOSTIC
@@ -975,8 +949,8 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 				if (ikey != NULL) {
 					size = sizeof(WT_IKEY) + ikey->size;
 					WT_TRET(__split_safe_free(
-					    session, 0, ikey, size));
-					WT_MEMSIZE_ADD(parent_decr, size);
+					    session, split_gen, 0, ikey, size));
+					parent_decr += size;
 				}
 				/*
 				 * The page_del structure can be freed
@@ -993,8 +967,8 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 			}
 
 			WT_TRET(__split_safe_free(
-			    session, 0, next_ref, sizeof(WT_REF)));
-			WT_MEMSIZE_ADD(parent_decr, sizeof(WT_REF));
+			    session, split_gen, 0, next_ref, sizeof(WT_REF)));
+			parent_decr += sizeof(WT_REF);
 		}
 	}
 
@@ -1003,8 +977,8 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 	 * Add it to the session discard list, to be freed when it's safe.
 	 */
 	size = sizeof(WT_PAGE_INDEX) + pindex->entries * sizeof(WT_REF *);
-	WT_TRET(__split_safe_free(session, exclusive, pindex, size));
-	WT_MEMSIZE_ADD(parent_decr, size);
+	WT_TRET(__split_safe_free(session, split_gen, exclusive, pindex, size));
+	parent_decr += size;
 
 	/*
 	 * Row-store trees where the old version of the page is being discarded:
@@ -1020,10 +994,7 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 		WT_TRET(__split_ovfl_key_cleanup(session, parent, ref));
 
 	/*
-	 * Adjust the parent's memory footprint.  This may look odd, but we
-	 * have already taken the allocation overhead into account, and an
-	 * increment followed by a decrement will cancel out the normal
-	 * adjustment.
+	 * Adjust the parent's memory footprint.
 	 */
 	__wt_cache_page_inmem_incr(session, parent, parent_incr);
 	__wt_cache_page_inmem_decr(session, parent, parent_decr);
@@ -1061,8 +1032,7 @@ __split_parent(WT_SESSION_IMPL *session, WT_REF *ref, WT_REF **ref_new,
 		 */
 		uint64_t __a, __b;
 		__a = parent->memory_footprint;
-		WT_WITH_PAGE_INDEX(session,
-		    ret = __split_deepen(session, parent, children));
+		ret = __split_deepen(session, parent, children);
 		__b = parent->memory_footprint;
 		if (__b * 2 >= __a)
 			F_SET_ATOMIC(parent, WT_PAGE_REFUSE_DEEPEN);
@@ -1110,6 +1080,7 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	WT_PAGE *page, *right;
 	WT_REF *child, *split_ref[2] = { NULL, NULL };
 	size_t page_decr, parent_decr, parent_incr, right_incr;
+	uint64_t split_gen;
 	int i;
 
 	*splitp = 0;
@@ -1198,9 +1169,9 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	} else
 		WT_ERR(__wt_row_leaf_key(
 		    session, page, &page->pg_row_d[0], key, 1));
-
 	WT_ERR(__wt_row_ikey(
 	    session, 0, key->data, key->size, &child->key.ikey));
+	parent_incr += sizeof(WT_REF) + sizeof(WT_IKEY) + key->size;
 	__wt_scr_free(session, &key);
 
 	/*
@@ -1209,8 +1180,8 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	WT_ERR(__wt_page_alloc(session, WT_PAGE_ROW_LEAF, 0, 0, 0, &right));
 	WT_ERR(__wt_calloc_one(session, &right->pg_row_ins));
 	WT_ERR(__wt_calloc_one(session, &right->pg_row_ins[0]));
-	WT_MEMSIZE_ADD(right_incr, sizeof(WT_INSERT_HEAD));
-	WT_MEMSIZE_ADD(right_incr, sizeof(WT_INSERT_HEAD *));
+	right_incr += sizeof(WT_INSERT_HEAD);
+	right_incr += sizeof(WT_INSERT_HEAD *);
 
 	WT_ERR(__wt_calloc_one(session, &split_ref[1]));
 	child = split_ref[1];
@@ -1219,19 +1190,18 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	WT_ERR(__wt_row_ikey(session, 0,
 	    WT_INSERT_KEY(moved_ins), WT_INSERT_KEY_SIZE(moved_ins),
 	    &child->key.ikey));
+	parent_incr +=
+	    sizeof(WT_REF) + sizeof(WT_IKEY) + WT_INSERT_KEY_SIZE(moved_ins);
 
 	/*
-	 * We're swapping WT_REFs in the parent, adjust the accounting, and
-	 * row store pages may have instantiated keys.
+	 * After the split, we're going to discard the WT_REF, account for the
+	 * change in memory footprint.  Row store pages have keys that may be
+	 * instantiated, check for that.
 	 */
-	WT_MEMSIZE_ADD(parent_incr, sizeof(WT_REF));
-	WT_MEMSIZE_ADD(
-	    parent_incr, sizeof(WT_IKEY) + WT_INSERT_KEY_SIZE(moved_ins));
-	WT_MEMSIZE_ADD(parent_decr, sizeof(WT_REF));
+	parent_decr += sizeof(WT_REF);
 	if (page->type == WT_PAGE_ROW_LEAF || page->type == WT_PAGE_ROW_INT)
 		if ((ikey = __wt_ref_key_instantiated(ref)) != NULL)
-			WT_MEMSIZE_ADD(
-			    parent_decr, sizeof(WT_IKEY) + ikey->size);
+			parent_decr += sizeof(WT_IKEY) + ikey->size;
 
 	/* The new page is dirty by definition. */
 	WT_ERR(__wt_page_modify_init(session, right));
@@ -1253,10 +1223,10 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	 */
 	for (i = 0; i < WT_SKIP_MAXDEPTH && ins_head->tail[i] == moved_ins; ++i)
 		;
-	WT_MEMSIZE_TRANSFER(page_decr, right_incr, sizeof(WT_INSERT) +
+	WT_MEM_TRANSFER(page_decr, right_incr, sizeof(WT_INSERT) +
 	    (size_t)i * sizeof(WT_INSERT *) + WT_INSERT_KEY_SIZE(moved_ins));
-	WT_MEMSIZE_TRANSFER(page_decr, right_incr,
-	    __wt_update_list_memsize(moved_ins->upd));
+	WT_MEM_TRANSFER(
+	    page_decr, right_incr, __wt_update_list_memsize(moved_ins->upd));
 
 	/*
 	 * Allocation operations completed, move the last insert list item from
@@ -1349,7 +1319,12 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	 */
 	page->modify->inmem_split_txn = __wt_txn_new_id(session);
 
-	/* Update the page accounting. */
+	/*
+	 * Update the page accounting.
+	 *
+	 * XXX
+	 * If we fail to split the parent, the page's accounting will be wrong.
+	 */
 	__wt_cache_page_inmem_decr(session, page, page_decr);
 	__wt_cache_page_inmem_incr(session, right, right_incr);
 
@@ -1358,8 +1333,8 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	 * longer locked, so we cannot safely look at it.
 	 */
 	page = NULL;
-	if ((ret = __split_parent(
-	    session, ref, split_ref, 2, parent_decr, parent_incr, 0, 0)) != 0) {
+	if ((ret = __split_parent(session, ref, split_ref, 2,
+	    parent_decr, parent_incr, 0, 0, &split_gen)) != 0) {
 		/*
 		 * Move the insert list element back to the original page list.
 		 * For simplicity, the previous skip list pointers originally
@@ -1396,8 +1371,8 @@ __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref, int *splitp)
 	 */
 	 if (ikey != NULL)
 		WT_TRET(__split_safe_free(
-		    session, 0, ikey, sizeof(WT_IKEY) + ikey->size));
-	WT_TRET(__split_safe_free(session, 0, ref, sizeof(WT_REF)));
+		    session, split_gen, 0, ikey, sizeof(WT_IKEY) + ikey->size));
+	WT_TRET(__split_safe_free(session, split_gen, 0, ref, sizeof(WT_REF)));
 
 	/*
 	 * A note on error handling: if we completed the split, return success,
@@ -1480,6 +1455,7 @@ __wt_split_multi(WT_SESSION_IMPL *session, WT_REF *ref, int exclusive)
 	WT_PAGE_MODIFY *mod;
 	WT_REF **ref_new;
 	size_t parent_decr, parent_incr;
+	uint64_t split_gen;
 	uint32_t i, new_entries;
 
 	page = ref->page;
@@ -1503,15 +1479,14 @@ __wt_split_multi(WT_SESSION_IMPL *session, WT_REF *ref, int exclusive)
 	 * change in memory footprint.  Row store pages have keys that may be
 	 * instantiated, check for that.
 	 */
-	WT_MEMSIZE_ADD(parent_decr, sizeof(WT_REF));
+	parent_decr += sizeof(WT_REF);
 	if (page->type == WT_PAGE_ROW_LEAF || page->type == WT_PAGE_ROW_INT)
 		if ((ikey = __wt_ref_key_instantiated(ref)) != NULL)
-			WT_MEMSIZE_ADD(
-			    parent_decr, sizeof(WT_IKEY) + ikey->size);
+			parent_decr += sizeof(WT_IKEY) + ikey->size;
 
 	/* Split into the parent. */
-	WT_ERR(__split_parent(session,
-	    ref, ref_new, new_entries, parent_decr, parent_incr, exclusive, 1));
+	WT_ERR(__split_parent(session, ref, ref_new, new_entries,
+	    parent_decr, parent_incr, exclusive, 1, &split_gen));
 
 	__wt_free(session, ref_new);
 
@@ -1534,9 +1509,10 @@ __wt_split_multi(WT_SESSION_IMPL *session, WT_REF *ref, int exclusive)
 	 * safe.
 	 */
 	if (ikey != NULL)
-		WT_TRET(__split_safe_free(
-		    session, exclusive, ikey, sizeof(WT_IKEY) + ikey->size));
-	WT_TRET(__split_safe_free(session, exclusive, ref, sizeof(WT_REF)));
+		WT_TRET(__split_safe_free(session, split_gen, exclusive,
+		    ikey, sizeof(WT_IKEY) + ikey->size));
+	WT_TRET(__split_safe_free(session, split_gen, exclusive,
+	    ref, sizeof(WT_REF)));
 
 	/*
 	 * A note on error handling: if we completed the split, return success,
diff --git a/src/third_party/wiredtiger/src/btree/bt_stat.c b/src/third_party/wiredtiger/src/btree/bt_stat.c
index d9ff2a6af1e..b7108b52395 100644
--- a/src/third_party/wiredtiger/src/btree/bt_stat.c
+++ b/src/third_party/wiredtiger/src/btree/bt_stat.c
@@ -45,8 +45,11 @@ __wt_btree_stat_init(WT_SESSION_IMPL *session, WT_CURSOR_STAT *cst)
 
 	next_walk = NULL;
 	while ((ret =
-	    __wt_tree_walk(session, &next_walk, 0)) == 0 && next_walk != NULL)
-		WT_RET(__stat_page(session, next_walk->page, stats));
+	    __wt_tree_walk(session, &next_walk, 0)) == 0 && next_walk != NULL) {
+		WT_WITH_PAGE_INDEX(session,
+		    ret = __stat_page(session, next_walk->page, stats));
+		WT_RET(ret);
+	}
 	return (ret == WT_NOTFOUND ? 0 : ret);
 }
 
diff --git a/src/third_party/wiredtiger/src/btree/bt_vrfy.c b/src/third_party/wiredtiger/src/btree/bt_vrfy.c
index fafb4b58fc4..2957eda3a49 100644
--- a/src/third_party/wiredtiger/src/btree/bt_vrfy.c
+++ b/src/third_party/wiredtiger/src/btree/bt_vrfy.c
@@ -366,11 +366,16 @@ recno_chk:	if (recno != vs->record_total + 1)
 				goto celltype_err;
 			break;
 		case WT_PAGE_COL_VAR:
-		case WT_PAGE_ROW_LEAF:
 			if (unpack->raw != WT_CELL_ADDR_LEAF &&
 			    unpack->raw != WT_CELL_ADDR_LEAF_NO)
 				goto celltype_err;
 			break;
+		case WT_PAGE_ROW_LEAF:
+			if (unpack->raw != WT_CELL_ADDR_DEL &&
+			    unpack->raw != WT_CELL_ADDR_LEAF &&
+			    unpack->raw != WT_CELL_ADDR_LEAF_NO)
+				goto celltype_err;
+			break;
 		case WT_PAGE_COL_INT:
 		case WT_PAGE_ROW_INT:
 			if (unpack->raw != WT_CELL_ADDR_INT)
diff --git a/src/third_party/wiredtiger/src/btree/col_srch.c b/src/third_party/wiredtiger/src/btree/col_srch.c
index 4c418f91de0..db1b565b439 100644
--- a/src/third_party/wiredtiger/src/btree/col_srch.c
+++ b/src/third_party/wiredtiger/src/btree/col_srch.c
@@ -49,6 +49,7 @@ restart:	page = current->page;
 
 		WT_ASSERT(session, current->key.recno == page->pg_intl_recno);
 
+		WT_ASSERT(session, session->split_gen != 0);
 		pindex = WT_INTL_INDEX_COPY(page);
 		base = pindex->entries;
 		descent = pindex->index[base - 1];
diff --git a/src/third_party/wiredtiger/src/btree/row_srch.c b/src/third_party/wiredtiger/src/btree/row_srch.c
index 036e11bec6d..9967c5ecb0c 100644
--- a/src/third_party/wiredtiger/src/btree/row_srch.c
+++ b/src/third_party/wiredtiger/src/btree/row_srch.c
@@ -195,6 +195,7 @@ restart:	page = current->page;
 		if (page->type != WT_PAGE_ROW_INT)
 			break;
 
+		WT_ASSERT(session, session->split_gen != 0);
 		pindex = WT_INTL_INDEX_COPY(page);
 
 		/*
@@ -487,6 +488,7 @@ restart:
 		if (page->type != WT_PAGE_ROW_INT)
 			break;
 
+		WT_ASSERT(session, session->split_gen != 0);
 		pindex = WT_INTL_INDEX_COPY(page);
 		descent = pindex->index[
 		    __wt_random(session->rnd) % pindex->entries];
@@ -521,6 +523,7 @@ restart:
 		 */
 		cbt->ref = current;
 		cbt->compare = 0;
+		WT_ASSERT(session, session->split_gen != 0);
 		pindex = WT_INTL_INDEX_COPY(btree->root.page);
 		cbt->slot = pindex->entries < 2 ?
 		    __wt_random(session->rnd) % page->pg_row_entries : 0;
diff --git a/src/third_party/wiredtiger/src/config/config_def.c b/src/third_party/wiredtiger/src/config/config_def.c
index 646551cdd38..a7e9419a65c 100644
--- a/src/third_party/wiredtiger/src/config/config_def.c
+++ b/src/third_party/wiredtiger/src/config/config_def.c
@@ -152,6 +152,8 @@ static const WT_CONFIG_CHECK confchk_file_meta[] = {
 	{ "os_cache_max", "int", "min=0", NULL },
 	{ "prefix_compression", "boolean", NULL, NULL },
 	{ "prefix_compression_min", "int", "min=0", NULL },
+	{ "split_deepen_min_child", "int", NULL, NULL },
+	{ "split_deepen_per_child", "int", NULL, NULL },
 	{ "split_pct", "int", "min=25,max=100", NULL },
 	{ "value_format", "format", NULL, NULL },
 	{ "version", "string", NULL, NULL },
@@ -246,6 +248,8 @@ static const WT_CONFIG_CHECK confchk_session_create[] = {
 	{ "prefix_compression", "boolean", NULL, NULL },
 	{ "prefix_compression_min", "int", "min=0", NULL },
 	{ "source", "string", NULL, NULL },
+	{ "split_deepen_min_child", "int", NULL, NULL },
+	{ "split_deepen_per_child", "int", NULL, NULL },
 	{ "split_pct", "int", "min=25,max=100", NULL },
 	{ "type", "string", NULL, NULL },
 	{ "value_format", "format", NULL, NULL },
@@ -585,7 +589,8 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  ",key_format=u,key_gap=10,leaf_item_max=0,leaf_key_max=0,"
 	  "leaf_page_max=32KB,leaf_value_max=0,memory_page_max=5MB,"
 	  "os_cache_dirty_max=0,os_cache_max=0,prefix_compression=0,"
-	  "prefix_compression_min=4,split_pct=75,value_format=u,"
+	  "prefix_compression_min=4,split_deepen_min_child=0,"
+	  "split_deepen_per_child=0,split_pct=75,value_format=u,"
 	  "version=(major=0,minor=0)",
 	  confchk_file_meta
 	},
@@ -626,8 +631,8 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  "bloom_hash_count=8,bloom_oldest=0,chunk_max=5GB,chunk_size=10MB,"
 	  "merge_max=15,merge_min=0),memory_page_max=5MB,"
 	  "os_cache_dirty_max=0,os_cache_max=0,prefix_compression=0,"
-	  "prefix_compression_min=4,source=,split_pct=75,type=file,"
-	  "value_format=u",
+	  "prefix_compression_min=4,source=,split_deepen_min_child=0,"
+	  "split_deepen_per_child=0,split_pct=75,type=file,value_format=u",
 	  confchk_session_create
 	},
 	{ "session.drop",
diff --git a/src/third_party/wiredtiger/src/conn/conn_cache_pool.c b/src/third_party/wiredtiger/src/conn/conn_cache_pool.c
index 861bafed900..f5b78e33b04 100644
--- a/src/third_party/wiredtiger/src/conn/conn_cache_pool.c
+++ b/src/third_party/wiredtiger/src/conn/conn_cache_pool.c
@@ -448,15 +448,15 @@ __cache_pool_assess(WT_SESSION_IMPL *session, uint64_t *phighest)
 			continue;
 		cache = entry->cache;
 		++entries;
-		new = cache->bytes_evict;
+		new = cache->bytes_read;
 		/* Handle wrapping of eviction requests. */
-		if (new >= cache->cp_saved_evict)
-			cache->cp_current_evict = new - cache->cp_saved_evict;
+		if (new >= cache->cp_saved_read)
+			cache->cp_current_read = new - cache->cp_saved_read;
 		else
-			cache->cp_current_evict = new;
-		cache->cp_saved_evict = new;
-		if (cache->cp_current_evict > highest)
-			highest = cache->cp_current_evict;
+			cache->cp_current_read = new;
+		cache->cp_saved_read = new;
+		if (cache->cp_current_read > highest)
+			highest = cache->cp_current_read;
 	}
 	WT_RET(__wt_verbose(session, WT_VERB_SHARED_CACHE,
 	    "Highest eviction count: %" PRIu64 ", entries: %" PRIu64,
@@ -501,7 +501,7 @@ __cache_pool_adjust(WT_SESSION_IMPL *session,
 		reserved = cache->cp_reserved;
 		adjusted = 0;
 
-		read_pressure = cache->cp_current_evict / highest;
+		read_pressure = cache->cp_current_read / highest;
 		WT_RET(__wt_verbose(session, WT_VERB_SHARED_CACHE,
 		    "\t%" PRIu64 ", %" PRIu64 ", %" PRIu32,
 		    entry->cache_size, read_pressure, cache->cp_skip_count));
diff --git a/src/third_party/wiredtiger/src/conn/conn_sweep.c b/src/third_party/wiredtiger/src/conn/conn_sweep.c
index 01f08aa5f07..a5bd8e1343c 100644
--- a/src/third_party/wiredtiger/src/conn/conn_sweep.c
+++ b/src/third_party/wiredtiger/src/conn/conn_sweep.c
@@ -32,14 +32,14 @@ __sweep(WT_SESSION_IMPL *session)
 		dhandle_next = SLIST_NEXT(dhandle, l);
 		if (WT_IS_METADATA(dhandle))
 			continue;
-		if (dhandle->session_inuse == 0 && dhandle->timeofdeath == 0) {
+		if (dhandle->session_inuse != 0 ||
+		    now <= dhandle->timeofdeath + WT_DHANDLE_SWEEP_WAIT)
+			continue;
+		if (dhandle->timeofdeath == 0) {
 			dhandle->timeofdeath = now;
 			WT_STAT_FAST_CONN_INCR(session, dh_conn_tod);
 			continue;
 		}
-		if (dhandle->session_inuse != 0 ||
-		    now <= dhandle->timeofdeath + WT_DHANDLE_SWEEP_WAIT)
-			continue;
 
 		/*
 		 * We have a candidate for closing; if it's open, acquire an
diff --git a/src/third_party/wiredtiger/src/evict/evict_file.c b/src/third_party/wiredtiger/src/evict/evict_file.c
index 553acc988f0..5aa85872a3b 100644
--- a/src/third_party/wiredtiger/src/evict/evict_file.c
+++ b/src/third_party/wiredtiger/src/evict/evict_file.c
@@ -90,33 +90,43 @@ __wt_evict_file(WT_SESSION_IMPL *session, int syncop)
 				WT_ERR(__wt_evict(session, ref, 1));
 			break;
 		case WT_SYNC_DISCARD:
-		case WT_SYNC_DISCARD_FORCE:
 			/*
-			 * Discard the page, whether clean or dirty.
-			 *
-			 * Clean the page, both to keep statistics correct, and
-			 * to let the page-discard function assert no dirty page
-			 * is ever discarded.
+			 * Ordinary discard of the page, whether clean or dirty.
+			 * If we see a dirty page in an ordinary discard (e.g.,
+			 * from sweep), give up: an update must have happened
+			 * since the file was selected for sweeping.
 			 */
-			if (__wt_page_is_modified(page)) {
-				page->modify->write_gen = 0;
-				__wt_cache_dirty_decr(session, page);
-			}
+			if (__wt_page_is_modified(page))
+				WT_ERR(EBUSY);
+
 			/*
 			 * If the page contains an update that is too recent to
 			 * evict, stop.  This should never happen during
-			 * connection close, and in other paths our caller
+			 * connection close, but in other paths our caller
 			 * should be prepared to deal with this case.
 			 */
-			if (syncop == WT_SYNC_DISCARD &&
-			    page->modify != NULL &&
+			if (page->modify != NULL &&
 			    !__wt_txn_visible_all(session,
 			    page->modify->rec_max_txn))
 				WT_ERR(EBUSY);
 
-			if (syncop == WT_SYNC_DISCARD_FORCE)
-				F_SET(session, WT_SESSION_DISCARD_FORCE);
-			__wt_rec_page_clean_update(session, ref);
+			__wt_evict_page_clean_update(session, ref);
+			break;
+		case WT_SYNC_DISCARD_FORCE:
+			/*
+			 * Forced discard of the page, whether clean or dirty.
+			 * If we see a dirty page in a forced discard, clean
+			 * the page, both to keep statistics correct, and to
+			 * let the page-discard function assert no dirty page
+			 * is ever discarded.
+			 */
+			if (__wt_page_is_modified(page)) {
+				page->modify->write_gen = 0;
+				__wt_cache_dirty_decr(session, page);
+			}
+
+			F_SET(session, WT_SESSION_DISCARD_FORCE);
+			__wt_evict_page_clean_update(session, ref);
 			F_CLR(session, WT_SESSION_DISCARD_FORCE);
 			break;
 		WT_ILLEGAL_VALUE_ERR(session);
diff --git a/src/third_party/wiredtiger/src/evict/evict_lru.c b/src/third_party/wiredtiger/src/evict/evict_lru.c
index 384ec9be5b3..6e7d3e9c6cd 100644
--- a/src/third_party/wiredtiger/src/evict/evict_lru.c
+++ b/src/third_party/wiredtiger/src/evict/evict_lru.c
@@ -205,11 +205,10 @@ __evict_server(void *arg)
 		    "cache server: exiting with %" PRIu64 " pages in "
 		    "memory and %" PRIu64 " pages evicted",
 		    cache->pages_inmem, cache->pages_evict);
-	if (cache->bytes_inmem != cache->bytes_evict)
+	if (cache->bytes_inmem != 0)
 		__wt_errx(session,
-		    "cache server: exiting with %" PRIu64 " bytes in "
-		    "memory and %" PRIu64 " bytes evicted",
-		    cache->bytes_inmem, cache->bytes_evict);
+		    "cache server: exiting with %" PRIu64 " bytes in memory",
+		    cache->bytes_inmem);
 	if (cache->bytes_dirty != 0 || cache->pages_dirty != 0)
 		__wt_errx(session,
 		    "cache server: exiting with %" PRIu64
diff --git a/src/third_party/wiredtiger/src/evict/evict_page.c b/src/third_party/wiredtiger/src/evict/evict_page.c
index 5bbf3b891f7..0cff584f2ab 100644
--- a/src/third_party/wiredtiger/src/evict/evict_page.c
+++ b/src/third_party/wiredtiger/src/evict/evict_page.c
@@ -98,7 +98,7 @@ __wt_evict(WT_SESSION_IMPL *session, WT_REF *ref, int exclusive)
 		if (__wt_ref_is_root(ref))
 			__wt_ref_out(session, ref);
 		else
-			__wt_rec_page_clean_update(session, ref);
+			__wt_evict_page_clean_update(session, ref);
 
 		WT_STAT_FAST_CONN_INCR(session, cache_eviction_clean);
 		WT_STAT_FAST_DATA_INCR(session, cache_eviction_clean);
@@ -139,11 +139,11 @@ done:	session->excl_next = 0;
 }
 
 /*
- * __wt_rec_page_clean_update --
+ * __wt_evict_page_clean_update --
  *	Update a clean page's reference on eviction.
  */
 void
-__wt_rec_page_clean_update(WT_SESSION_IMPL *session, WT_REF *ref)
+__wt_evict_page_clean_update(WT_SESSION_IMPL *session, WT_REF *ref)
 {
 	/*
 	 * Discard the page and update the reference structure; if the page has
@@ -327,6 +327,7 @@ __evict_review(WT_SESSION_IMPL *session, WT_REF *ref,
 	uint32_t flags;
 
 	btree = S2BT(session);
+	flags = WT_EVICTING;
 
 	/*
 	 * Get exclusive access to the page if our caller doesn't have the tree
@@ -472,7 +473,6 @@ __evict_review(WT_SESSION_IMPL *session, WT_REF *ref,
 	 * they are not expected to split).
 	 */
 	if (__wt_page_is_modified(page)) {
-		flags = WT_EVICTING;
 		if (exclusive)
 			LF_SET(WT_SKIP_UPDATE_ERR);
 		else if (top && !WT_PAGE_IS_INTERNAL(page) &&
@@ -482,17 +482,18 @@ __evict_review(WT_SESSION_IMPL *session, WT_REF *ref,
 		WT_ASSERT(session,
 		    !__wt_page_is_modified(page) ||
 		    LF_ISSET(WT_SKIP_UPDATE_RESTORE));
-	} else {
-		/*
-		 * If the page was ever modified, make sure all of the updates
-		 * on the page are old enough they can be discarded from cache.
-		 */
-		if (!exclusive && mod != NULL &&
-		    !__wt_txn_visible_all(session, mod->rec_max_txn))
-			return (EBUSY);
 	}
 
 	/*
+	 * If the page was ever modified, make sure all of the updates
+	 * on the page are old enough they can be discarded from cache.
+	 */
+	if (!exclusive && mod != NULL &&
+	    !__wt_txn_visible_all(session, mod->rec_max_txn) &&
+	    !LF_ISSET(WT_SKIP_UPDATE_RESTORE))
+		return (EBUSY);
+
+	/*
 	 * Repeat the test: fail if any page in the top-level page's subtree
 	 * won't be merged into its parent.
 	 */
diff --git a/src/third_party/wiredtiger/src/include/btmem.h b/src/third_party/wiredtiger/src/include/btmem.h
index aea9ee98742..ef6f9b40414 100644
--- a/src/third_party/wiredtiger/src/include/btmem.h
+++ b/src/third_party/wiredtiger/src/include/btmem.h
@@ -192,7 +192,7 @@ struct __wt_page_modify {
 	uint64_t inmem_split_txn;
 
 	/* Dirty bytes added to the cache. */
-	uint64_t bytes_dirty;
+	size_t bytes_dirty;
 
 	/*
 	 * When pages are reconciled, the result is one or more replacement
@@ -532,7 +532,7 @@ struct __wt_page {
 #define	WT_READGEN_STEP		100
 	uint64_t read_gen;
 
-	uint64_t memory_footprint;	/* Memory attached to the page */
+	size_t memory_footprint;	/* Memory attached to the page */
 
 #define	WT_PAGE_IS_INTERNAL(page)					\
 	((page)->type == WT_PAGE_COL_INT || (page)->type == WT_PAGE_ROW_INT)
@@ -759,11 +759,11 @@ struct __wt_col {
  * with RLE counts greater than 1 when reading the page.  We can do a binary
  * search in this array, then an offset calculation to find the cell.
  */
-struct __wt_col_rle {
+WT_PACKED_STRUCT_BEGIN(__wt_col_rle)
 	uint64_t recno;			/* Record number of first repeat. */
 	uint64_t rle;			/* Repeat count. */
 	uint32_t indx;			/* Slot of entry in col_var.d */
-} WT_GCC_ATTRIBUTE((packed));
+WT_PACKED_STRUCT_END
 
 /*
  * WT_COL_PTR, WT_COL_PTR_SET --
@@ -827,7 +827,7 @@ struct __wt_ikey {
  * is done for an entry, WT_UPDATE structures are formed into a forward-linked
  * list.
  */
-struct __wt_update {
+WT_PACKED_STRUCT_BEGIN(__wt_update)
 	uint64_t txnid;			/* update transaction */
 
 	WT_UPDATE *next;		/* forward-linked list */
@@ -846,7 +846,7 @@ struct __wt_update {
 	/* The untyped value immediately follows the WT_UPDATE structure. */
 #define	WT_UPDATE_DATA(upd)						\
 	((void *)((uint8_t *)(upd) + sizeof(WT_UPDATE)))
-} WT_GCC_ATTRIBUTE((packed));
+};
 
 /*
  * WT_INSERT --
@@ -1004,11 +1004,18 @@ struct __wt_insert_head {
  * already have a split generation, leave it alone.  If our caller is examining
  * an index, we don't want the oldest split generation to move forward and
  * potentially free it.
+ *
+ * Check that we haven't raced with a split_gen update after publishing: we
+ * rely on the published value not being missed when scanning for the oldest
+ * active split_gen.
  */
 #define	WT_ENTER_PAGE_INDEX(session) do {				\
 	uint64_t __prev_split_gen = (session)->split_gen;		\
 	if (__prev_split_gen == 0)					\
-		WT_PUBLISH((session)->split_gen, S2C(session)->split_gen)
+		do {                                                    \
+			WT_PUBLISH((session)->split_gen,                \
+			    S2C(session)->split_gen);                   \
+		} while ((session)->split_gen != S2C(session)->split_gen)
 
 #define	WT_LEAVE_PAGE_INDEX(session)					\
 	if (__prev_split_gen == 0)					\
diff --git a/src/third_party/wiredtiger/src/include/btree.h b/src/third_party/wiredtiger/src/include/btree.h
index fa01dd5edc2..dd3acf6940d 100644
--- a/src/third_party/wiredtiger/src/include/btree.h
+++ b/src/third_party/wiredtiger/src/include/btree.h
@@ -98,14 +98,21 @@ struct __wt_btree {
 		CKSUM_UNCOMPRESSED=3	/* Uncompressed blocks only */
 	} checksum;			/* Checksum configuration */
 
-	u_int dictionary;		/* Reconcile: dictionary slots */
-	int   internal_key_truncate;	/* Reconcile: internal key truncate */
-	int   maximum_depth;		/* Reconcile: maximum tree depth */
-	int   prefix_compression;	/* Reconcile: prefix compression */
-	u_int prefix_compression_min;	/* Reconcile: prefix compression min */
-	int   split_pct;		/* Reconcile: split page percent */
-	WT_COMPRESSOR *compressor;	/* Reconcile: page compressor */
-	WT_RWLOCK *ovfl_lock;		/* Reconcile: overflow lock */
+	/*
+	 * Reconciliation...
+	 */
+	u_int dictionary;		/* Dictionary slots */
+	int   internal_key_truncate;	/* Internal key truncate */
+	int   maximum_depth;		/* Maximum tree depth */
+	int   prefix_compression;	/* Prefix compression */
+	u_int prefix_compression_min;	/* Prefix compression min */
+#define	WT_SPLIT_DEEPEN_MIN_CHILD_DEF	10000
+	u_int split_deepen_min_child;	/* Minimum entries to deepen tree */
+#define	WT_SPLIT_DEEPEN_PER_CHILD_DEF	100
+	u_int split_deepen_per_child;	/* Entries per child when deepened */
+	int   split_pct;		/* Split page percent */
+	WT_COMPRESSOR *compressor;	/* Page compressor */
+	WT_RWLOCK *ovfl_lock;		/* Overflow lock */
 
 	uint64_t last_recno;		/* Column-store last record number */
 
diff --git a/src/third_party/wiredtiger/src/include/btree.i b/src/third_party/wiredtiger/src/include/btree.i
index 0dffdc798af..a0cbb23f126 100644
--- a/src/third_party/wiredtiger/src/include/btree.i
+++ b/src/third_party/wiredtiger/src/include/btree.i
@@ -75,6 +75,52 @@ __wt_cache_page_inmem_incr(WT_SESSION_IMPL *session, WT_PAGE *page, size_t size)
 #endif
 
 /*
+ * __wt_cache_page_byte_dirty_decr --
+ *	Decrement the page's dirty byte count, guarding from underflow.
+ */
+static inline void
+__wt_cache_page_byte_dirty_decr(
+    WT_SESSION_IMPL *session, WT_PAGE *page, size_t size)
+{
+	WT_CACHE *cache;
+	size_t decr, orig;
+	int i;
+
+	cache = S2C(session)->cache;
+
+	/*
+	 * We don't have exclusive access and there are ways of decrementing the
+	 * page's dirty byte count by a too-large value. For example:
+	 *	T1: __wt_cache_page_inmem_incr(page, size)
+	 *		page is clean, don't increment dirty byte count
+	 *	T2: mark page dirty
+	 *	T1: __wt_cache_page_inmem_decr(page, size)
+	 *		page is dirty, decrement dirty byte count
+	 * and, of course, the reverse where the page is dirty at the increment
+	 * and clean at the decrement.
+	 *
+	 * The page's dirty-byte value always reflects bytes represented in the
+	 * cache's dirty-byte count, decrement the page/cache as much as we can
+	 * without underflow. If we can't decrement the dirty byte counts after
+	 * few tries, give up: the cache's value will be wrong, but consistent,
+	 * and we'll fix it the next time this page is marked clean, or evicted.
+	 */
+	for (i = 0; i < 5; ++i) {
+		/*
+		 * Take care to read the dirty-byte count only once in case
+		 * we're racing with updates.
+		 */
+		orig = page->modify->bytes_dirty;
+		decr = WT_MIN(size, orig);
+		if (WT_ATOMIC_CAS8(
+		    page->modify->bytes_dirty, orig, orig - decr)) {
+			WT_CACHE_DECR(session, cache->bytes_dirty, decr);
+			break;
+		}
+	}
+}
+
+/*
  * __wt_cache_page_inmem_decr --
  *	Decrement a page's memory footprint in the cache.
  */
@@ -87,17 +133,16 @@ __wt_cache_page_inmem_decr(WT_SESSION_IMPL *session, WT_PAGE *page, size_t size)
 
 	WT_ASSERT(session, size < WT_EXABYTE);
 
-	WT_CACHE_DECR(session, page->memory_footprint, size);
 	WT_CACHE_DECR(session, cache->bytes_inmem, size);
-	if (__wt_page_is_modified(page)) {
-		WT_CACHE_DECR(session, cache->bytes_dirty, size);
-		WT_CACHE_DECR(session, page->modify->bytes_dirty, size);
-	}
+	WT_CACHE_DECR(session, page->memory_footprint, size);
+	if (__wt_page_is_modified(page))
+		__wt_cache_page_byte_dirty_decr(session, page, size);
 }
 
 /*
  * __wt_cache_dirty_incr --
- *	Increment the cache dirty page/byte counts.
+ *	Page switch from clean to dirty: increment the cache dirty page/byte
+ * counts.
  */
 static inline void
 __wt_cache_dirty_incr(WT_SESSION_IMPL *session, WT_PAGE *page)
@@ -119,42 +164,29 @@ __wt_cache_dirty_incr(WT_SESSION_IMPL *session, WT_PAGE *page)
 
 /*
  * __wt_cache_dirty_decr --
- *	Decrement the cache dirty page/byte counts.
+ *	Page switch from dirty to clean: decrement the cache dirty page/byte
+ * counts.
  */
 static inline void
 __wt_cache_dirty_decr(WT_SESSION_IMPL *session, WT_PAGE *page)
 {
 	WT_CACHE *cache;
-	size_t size;
+	WT_PAGE_MODIFY *modify;
 
 	cache = S2C(session)->cache;
 
 	if (cache->pages_dirty < 1) {
-		(void)__wt_errx(session,
-		   "cache dirty decrement failed: cache dirty page count went "
-		   "negative");
+		__wt_errx(session,
+		   "cache eviction dirty-page decrement failed: dirty page"
+		   "count went negative");
 		cache->pages_dirty = 0;
 	} else
 		(void)WT_ATOMIC_SUB8(cache->pages_dirty, 1);
 
-	/*
-	 * It is possible to decrement the footprint of the page without making
-	 * the page dirty (for example when freeing an obsolete update list),
-	 * so the footprint could change between read and decrement, and we
-	 * might attempt to decrement by a different amount than the bytes held
-	 * by the page.
-	 *
-	 * We catch that by maintaining a per-page dirty size, and fixing the
-	 * cache stats if that is non-zero when the page is discarded.
-	 *
-	 * Also take care that the global size doesn't go negative.  This may
-	 * lead to small accounting errors (particularly on the last page of the
-	 * last file in a checkpoint), but that will come out in the wash when
-	 * the page is evicted.
-	 */
-	size = WT_MIN(page->memory_footprint, cache->bytes_dirty);
-	(void)WT_ATOMIC_SUB8(cache->bytes_dirty, size);
-	(void)WT_ATOMIC_SUB8(page->modify->bytes_dirty, size);
+	modify = page->modify;
+	if (modify != NULL && modify->bytes_dirty != 0)
+		__wt_cache_page_byte_dirty_decr(
+		    session, page, modify->bytes_dirty);
 }
 
 /*
@@ -165,23 +197,28 @@ static inline void
 __wt_cache_page_evict(WT_SESSION_IMPL *session, WT_PAGE *page)
 {
 	WT_CACHE *cache;
-	WT_PAGE_MODIFY *mod;
+	WT_PAGE_MODIFY *modify;
 
 	cache = S2C(session)->cache;
-	mod = page->modify;
-
-	/*
-	 * In rare cases, we may race tracking a page's dirty footprint.
-	 * If so, we will get here with a non-zero dirty_size in the page, and
-	 * we can fix the global stats.
-	 */
-	if (mod != NULL && mod->bytes_dirty != 0)
-		(void)WT_ATOMIC_SUB8(cache->bytes_dirty, mod->bytes_dirty);
+	modify = page->modify;
+
+	/* Update the bytes in-memory to reflect the eviction. */
+	WT_CACHE_DECR(session, cache->bytes_inmem, page->memory_footprint);
+
+	/* Update the cache's dirty-byte count. */
+	if (modify != NULL && modify->bytes_dirty != 0) {
+		if (cache->bytes_dirty < modify->bytes_dirty) {
+			__wt_errx(session,
+			   "cache eviction dirty-bytes decrement failed: "
+			   "dirty byte count went negative");
+			cache->bytes_dirty = 0;
+		} else
+			WT_CACHE_DECR(
+			    session, cache->bytes_dirty, modify->bytes_dirty);
+	}
 
-	WT_ASSERT(session, page->memory_footprint != 0);
+	/* Update pages and bytes evicted. */
 	(void)WT_ATOMIC_ADD8(cache->bytes_evict, page->memory_footprint);
-	page->memory_footprint = 0;
-
 	(void)WT_ATOMIC_ADD8(cache->pages_evict, 1);
 }
 
@@ -221,8 +258,7 @@ __wt_page_refp(WT_SESSION_IMPL *session,
 	WT_PAGE_INDEX *pindex;
 	uint32_t i;
 
-	WT_ASSERT(session,
-	    WT_SESSION_TXN_STATE(session)->snap_min != WT_TXN_NONE);
+	WT_ASSERT(session, session->split_gen != 0);
 
 	/*
 	 * Copy the parent page's index value: the page can split at any time,
@@ -894,11 +930,11 @@ __wt_ref_info(WT_SESSION_IMPL *session,
 }
 
 /*
- * __wt_page_release_busy --
- *	Release a reference to a page, fail if busy during forced eviction.
+ * __wt_page_release_evict --
+ *	Attempt to release and immediately evict a page.
  */
 static inline int
-__wt_page_release_busy(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t flags)
+__wt_page_release_evict(WT_SESSION_IMPL *session, WT_REF *ref)
 {
 	WT_BTREE *btree;
 	WT_DECL_RET;
@@ -906,37 +942,8 @@ __wt_page_release_busy(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t flags)
 	int locked, too_big;
 
 	btree = S2BT(session);
-
-	/*
-	 * Discard our hazard pointer.  Ignore pages we don't have and the root
-	 * page, which sticks in memory, regardless.
-	 */
-	if (ref == NULL || __wt_ref_is_root(ref))
-		return (0);
 	page = ref->page;
-
-	too_big = (page->memory_footprint < btree->maxmempage) ? 0 : 1;
-
-	/*
-	 * Attempt to evict pages with the special "oldest" read generation.
-	 *
-	 * This is set for pages that grow larger than the configured
-	 * memory_page_max setting, and when we are attempting to scan without
-	 * trashing the cache.
-	 *
-	 * Skip this if eviction is disabled for this operation or this tree,
-	 * or if there is no chance of eviction succeeding for dirty pages due
-	 * to a checkpoint or because we've already tried writing this page and
-	 * it contains an update that isn't stable.  Also skip forced eviction
-	 * if we just did an in-memory split.
-	 */
-	if (LF_ISSET(WT_READ_NO_EVICT) ||
-	    page->read_gen != WT_READGEN_OLDEST ||
-	    F_ISSET(btree, WT_BTREE_NO_EVICTION) ||
-	    (__wt_page_is_modified(page) && (btree->checkpointing ||
-	    !__wt_txn_visible_all(session, page->modify->first_dirty_txn) ||
-	    !__wt_txn_visible_all(session, page->modify->inmem_split_txn))))
-		return (__wt_hazard_clear(session, page));
+	too_big = (page->memory_footprint > btree->maxmempage) ? 1 : 0;
 
 	/*
 	 * Take some care with order of operations: if we release the hazard
@@ -945,8 +952,10 @@ __wt_page_release_busy(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t flags)
 	 */
 	locked = WT_ATOMIC_CAS4(ref->state, WT_REF_MEM, WT_REF_LOCKED);
 	WT_TRET(__wt_hazard_clear(session, page));
-	if (!locked)
+	if (!locked) {
+		WT_TRET(EBUSY);
 		return (ret);
+	}
 
 	(void)WT_ATOMIC_ADD4(btree->evict_busy, 1);
 	if ((ret = __wt_evict_page(session, ref)) == 0) {
@@ -970,12 +979,46 @@ __wt_page_release_busy(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t flags)
 
 /*
  * __wt_page_release --
- *	Release a reference to a page.
+ *	Release a reference to a page, fail if busy during forced eviction.
  */
 static inline int
 __wt_page_release(WT_SESSION_IMPL *session, WT_REF *ref, uint32_t flags)
 {
-	WT_RET_BUSY_OK(__wt_page_release_busy(session, ref, flags));
+	WT_BTREE *btree;
+	WT_PAGE *page;
+
+	btree = S2BT(session);
+
+	/*
+	 * Discard our hazard pointer.  Ignore pages we don't have and the root
+	 * page, which sticks in memory, regardless.
+	 */
+	if (ref == NULL || __wt_ref_is_root(ref))
+		return (0);
+	page = ref->page;
+
+	/*
+	 * Attempt to evict pages with the special "oldest" read generation.
+	 *
+	 * This is set for pages that grow larger than the configured
+	 * memory_page_max setting, and when we are attempting to scan without
+	 * trashing the cache.
+	 *
+	 * Skip this if eviction is disabled for this operation or this tree,
+	 * or if there is no chance of eviction succeeding for dirty pages due
+	 * to a checkpoint or because we've already tried writing this page and
+	 * it contains an update that isn't stable.  Also skip forced eviction
+	 * if we just did an in-memory split.
+	 */
+	if (LF_ISSET(WT_READ_NO_EVICT) ||
+	    page->read_gen != WT_READGEN_OLDEST ||
+	    F_ISSET(btree, WT_BTREE_NO_EVICTION) ||
+	    (__wt_page_is_modified(page) && (btree->checkpointing ||
+	    !__wt_txn_visible_all(session, page->modify->first_dirty_txn) ||
+	    !__wt_txn_visible_all(session, page->modify->inmem_split_txn))))
+		return (__wt_hazard_clear(session, page));
+
+	WT_RET_BUSY_OK(__wt_page_release_evict(session, ref));
 	return (0);
 }
 
diff --git a/src/third_party/wiredtiger/src/include/cache.h b/src/third_party/wiredtiger/src/include/cache.h
index deccd676e26..9db0729fe3c 100644
--- a/src/third_party/wiredtiger/src/include/cache.h
+++ b/src/third_party/wiredtiger/src/include/cache.h
@@ -60,6 +60,7 @@ struct __wt_cache {
 	uint64_t pages_evict;
 	uint64_t bytes_dirty;		/* Bytes/pages currently dirty */
 	uint64_t pages_dirty;
+	uint64_t bytes_read;		/* Bytes read into memory */
 
 	uint64_t evict_max_page_size;	/* Largest page seen at eviction */
 
@@ -102,8 +103,8 @@ struct __wt_cache {
 	/*
 	 * Cache pool information.
 	 */
-	uint64_t cp_saved_evict;	/* Evict count from last pass */
-	uint64_t cp_current_evict;	/* Evict count from current pass */
+	uint64_t cp_saved_read;		/* Read count from last pass */
+	uint64_t cp_current_read;	/* Read count from current pass */
 	uint32_t cp_skip_count;		/* Post change stabilization */
 	uint64_t cp_reserved;		/* Base size for this cache */
 	WT_SESSION_IMPL *cp_session;	/* May be used for cache management */
diff --git a/src/third_party/wiredtiger/src/include/cache.i b/src/third_party/wiredtiger/src/include/cache.i
index b1ace5e6a80..4bceb5c0d6c 100644
--- a/src/third_party/wiredtiger/src/include/cache.i
+++ b/src/third_party/wiredtiger/src/include/cache.i
@@ -62,7 +62,7 @@ __wt_cache_pages_inuse(WT_CACHE *cache)
 static inline uint64_t
 __wt_cache_bytes_inuse(WT_CACHE *cache)
 {
-	return (cache->bytes_inmem - cache->bytes_evict);
+	return (cache->bytes_inmem);
 }
 
 /*
diff --git a/src/third_party/wiredtiger/src/include/connection.h b/src/third_party/wiredtiger/src/include/connection.h
index ff34b014ecf..7b94a7ea94b 100644
--- a/src/third_party/wiredtiger/src/include/connection.h
+++ b/src/third_party/wiredtiger/src/include/connection.h
@@ -146,7 +146,7 @@ struct __wt_connection_impl {
 
 	WT_FH *lock_fh;			/* Lock file handle */
 
-	uint64_t  split_gen;		/* Generation number for splits */
+	volatile uint64_t  split_gen;	/* Generation number for splits */
 
 	/*
 	 * The connection keeps a cache of data handles. The set of handles
diff --git a/src/third_party/wiredtiger/src/include/cursor.i b/src/third_party/wiredtiger/src/include/cursor.i
index 8fa9790e096..ad42f989bf4 100644
--- a/src/third_party/wiredtiger/src/include/cursor.i
+++ b/src/third_party/wiredtiger/src/include/cursor.i
@@ -164,8 +164,11 @@ __wt_cursor_dhandle_decr_use(WT_SESSION_IMPL *session)
 
 	dhandle = session->dhandle;
 
+	/* If we close a handle with a time of death set, clear it. */
 	WT_ASSERT(session, dhandle->session_inuse > 0);
-	(void)WT_ATOMIC_SUB4(dhandle->session_inuse, 1);
+	if (WT_ATOMIC_SUB4(dhandle->session_inuse, 1) == 0 &&
+	    dhandle->timeofdeath != 0)
+		dhandle->timeofdeath = 0;
 }
 
 /*
diff --git a/src/third_party/wiredtiger/src/include/extern.h b/src/third_party/wiredtiger/src/include/extern.h
index ee9c27581c8..e47f4ba09c0 100644
--- a/src/third_party/wiredtiger/src/include/extern.h
+++ b/src/third_party/wiredtiger/src/include/extern.h
@@ -302,7 +302,7 @@ extern int __wt_evict_lru_page(WT_SESSION_IMPL *session, int is_server);
 extern int __wt_cache_wait(WT_SESSION_IMPL *session, int full);
 extern void __wt_cache_dump(WT_SESSION_IMPL *session);
 extern int __wt_evict(WT_SESSION_IMPL *session, WT_REF *ref, int exclusive);
-extern void __wt_rec_page_clean_update(WT_SESSION_IMPL *session, WT_REF *ref);
+extern void __wt_evict_page_clean_update(WT_SESSION_IMPL *session, WT_REF *ref);
 extern int __wt_log_ckpt(WT_SESSION_IMPL *session, WT_LSN *ckp_lsn);
 extern void __wt_log_written_reset(WT_SESSION_IMPL *session);
 extern int __wt_log_get_all_files(WT_SESSION_IMPL *session, char ***filesp, u_int *countp, uint32_t *maxid, int active_only);
@@ -423,7 +423,7 @@ extern int __wt_meta_track_handle_lock(WT_SESSION_IMPL *session, int created);
 extern int __wt_turtle_init(WT_SESSION_IMPL *session);
 extern int __wt_turtle_read(WT_SESSION_IMPL *session, const char *key, char **valuep);
 extern int __wt_turtle_update( WT_SESSION_IMPL *session, const char *key, const char *value);
-extern void __wt_abort(WT_SESSION_IMPL *session) WT_GCC_ATTRIBUTE((noreturn));
+extern void __wt_abort(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((noreturn));
 extern int __wt_calloc(WT_SESSION_IMPL *session, size_t number, size_t size, void *retp);
 extern int __wt_realloc(WT_SESSION_IMPL *session, size_t *bytes_allocated_ret, size_t bytes_to_allocate, void *retp);
 extern int __wt_realloc_aligned(WT_SESSION_IMPL *session, size_t *bytes_allocated_ret, size_t bytes_to_allocate, void *retp);
@@ -567,13 +567,13 @@ extern uint32_t __wt_cksum(const void *chunk, size_t len);
 extern void __wt_cksum_init(void);
 extern void __wt_event_handler_set(WT_SESSION_IMPL *session, WT_EVENT_HANDLER *handler);
 extern int __wt_eventv(WT_SESSION_IMPL *session, int msg_event, int error, const char *file_name, int line_number, const char *fmt, va_list ap);
-extern void __wt_err(WT_SESSION_IMPL *session, int error, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 3, 4)));
-extern void __wt_errx(WT_SESSION_IMPL *session, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 2, 3)));
-extern int __wt_ext_err_printf( WT_EXTENSION_API *wt_api, WT_SESSION *wt_session, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 3, 4)));
-extern int __wt_msg(WT_SESSION_IMPL *session, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 2, 3)));
-extern int __wt_ext_msg_printf( WT_EXTENSION_API *wt_api, WT_SESSION *wt_session, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 3, 4)));
+extern void __wt_err(WT_SESSION_IMPL *session, int error, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 3, 4)));
+extern void __wt_errx(WT_SESSION_IMPL *session, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 2, 3)));
+extern int __wt_ext_err_printf( WT_EXTENSION_API *wt_api, WT_SESSION *wt_session, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 3, 4)));
+extern int __wt_msg(WT_SESSION_IMPL *session, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 2, 3)));
+extern int __wt_ext_msg_printf( WT_EXTENSION_API *wt_api, WT_SESSION *wt_session, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 3, 4)));
 extern int __wt_progress(WT_SESSION_IMPL *session, const char *s, uint64_t v);
-extern void __wt_assert(WT_SESSION_IMPL *session, int error, const char *file_name, int line_number, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 5, 6)));
+extern void __wt_assert(WT_SESSION_IMPL *session, int error, const char *file_name, int line_number, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 5, 6)));
 extern int __wt_panic(WT_SESSION_IMPL *session);
 extern int __wt_illegal_value(WT_SESSION_IMPL *session, const char *name);
 extern int __wt_object_unsupported(WT_SESSION_IMPL *session, const char *uri);
@@ -616,8 +616,8 @@ extern uint32_t __wt_rduppo2(uint32_t n, uint32_t po2);
 extern void __wt_random_init(uint32_t *rnd);
 extern uint32_t __wt_random(uint32_t *rnd);
 extern int __wt_buf_grow_worker(WT_SESSION_IMPL *session, WT_ITEM *buf, size_t size);
-extern int __wt_buf_fmt(WT_SESSION_IMPL *session, WT_ITEM *buf, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 3, 4)));
-extern int __wt_buf_catfmt(WT_SESSION_IMPL *session, WT_ITEM *buf, const char *fmt, ...) WT_GCC_ATTRIBUTE((format (printf, 3, 4)));
+extern int __wt_buf_fmt(WT_SESSION_IMPL *session, WT_ITEM *buf, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 3, 4)));
+extern int __wt_buf_catfmt(WT_SESSION_IMPL *session, WT_ITEM *buf, const char *fmt, ...) WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 3, 4)));
 extern int
 __wt_scr_alloc_func(WT_SESSION_IMPL *session, size_t size, WT_ITEM **scratchp
 #ifdef HAVE_DIAGNOSTIC
diff --git a/src/third_party/wiredtiger/src/include/gcc.h b/src/third_party/wiredtiger/src/include/gcc.h
index 7b606ca80b1..805838eb84b 100644
--- a/src/third_party/wiredtiger/src/include/gcc.h
+++ b/src/third_party/wiredtiger/src/include/gcc.h
@@ -7,7 +7,12 @@
  */
 
 /* Add GCC-specific attributes to types and function declarations. */
-#define	WT_GCC_ATTRIBUTE(x)	__attribute__(x)
+#define	WT_COMPILER_TYPE_ALIGN(x)	__attribute__((aligned(x)))
+
+#define	WT_PACKED_STRUCT_BEGIN(name)					\
+	struct __attribute__ ((__packed__)) name {
+#define	WT_PACKED_STRUCT_END						\
+	};
 
 /*
  * Attribute are only permitted on function declarations, not definitions.
@@ -15,6 +20,7 @@
  * dist/s_prototypes to create extern.h.
  */
 #define	WT_GCC_FUNC_ATTRIBUTE(x)
+#define	WT_GCC_FUNC_DECL_ATTRIBUTE(x) __attribute__(x)
 
 /*
  * Atomic writes:
diff --git a/src/third_party/wiredtiger/src/include/lint.h b/src/third_party/wiredtiger/src/include/lint.h
index 9c560339e03..5668abc6dab 100644
--- a/src/third_party/wiredtiger/src/include/lint.h
+++ b/src/third_party/wiredtiger/src/include/lint.h
@@ -6,8 +6,15 @@
  * See the file LICENSE for redistribution information.
  */
 
-#define	WT_GCC_ATTRIBUTE(x)
+#define	WT_COMPILER_TYPE_ALIGN(x)
+
+#define	WT_PACKED_STRUCT_BEGIN(name)					\
+	struct name {
+#define	WT_PACKED_STRUCT_END						\
+	};
+
 #define	WT_GCC_FUNC_ATTRIBUTE(x)
+#define	WT_GCC_FUNC_DECL_ATTRIBUTE(x)
 
 #define	__WT_ATOMIC_ADD(v, val)						\
     ((v) += (val))
diff --git a/src/third_party/wiredtiger/src/include/log.h b/src/third_party/wiredtiger/src/include/log.h
index f88a5381227..82d90070609 100644
--- a/src/third_party/wiredtiger/src/include/log.h
+++ b/src/third_party/wiredtiger/src/include/log.h
@@ -70,7 +70,7 @@
 #define	WT_LOG_SLOT_FREE	1
 #define	WT_LOG_SLOT_PENDING	2
 #define	WT_LOG_SLOT_READY	3
-typedef struct {
+typedef WT_COMPILER_TYPE_ALIGN(WT_CACHE_LINE_ALIGNMENT) struct {
 	int64_t	 slot_state;		/* Slot state */
 	uint64_t slot_group_size;	/* Group size */
 	int32_t	 slot_error;		/* Error value */
@@ -90,7 +90,7 @@ typedef struct {
 #define	SLOT_SYNC	0x08			/* Needs sync on release */
 #define	SLOT_SYNC_DIR	0x10			/* Directory sync on release */
 	uint32_t flags;			/* Flags */
-} WT_LOGSLOT WT_GCC_ATTRIBUTE((aligned(WT_CACHE_LINE_ALIGNMENT)));
+} WT_LOGSLOT;
 
 typedef struct {
 	WT_LOGSLOT	*slot;
diff --git a/src/third_party/wiredtiger/src/include/lsm.h b/src/third_party/wiredtiger/src/include/lsm.h
index 8038e5a34ab..8d50f3ea73b 100644
--- a/src/third_party/wiredtiger/src/include/lsm.h
+++ b/src/third_party/wiredtiger/src/include/lsm.h
@@ -73,7 +73,7 @@ struct __wt_cursor_lsm {
  * WT_LSM_CHUNK --
  *	A single chunk (file) in an LSM tree.
  */
-struct __wt_lsm_chunk {
+struct WT_COMPILER_TYPE_ALIGN(WT_CACHE_LINE_ALIGNMENT) __wt_lsm_chunk {
 	const char *uri;		/* Data source for this chunk */
 	const char *bloom_uri;		/* URI of Bloom filter, if any */
 	struct timespec create_ts;	/* Creation time (for rate limiting) */
@@ -101,7 +101,7 @@ struct __wt_lsm_chunk {
 #define	WT_LSM_CHUNK_ONDISK	0x04
 #define	WT_LSM_CHUNK_STABLE	0x08
 	uint32_t flags;
-} WT_GCC_ATTRIBUTE((aligned(WT_CACHE_LINE_ALIGNMENT)));
+};
 
 /*
  * Different types of work units. Used by LSM worker threads to choose which
diff --git a/src/third_party/wiredtiger/src/include/msvc.h b/src/third_party/wiredtiger/src/include/msvc.h
index f176a40f2bf..3ec74b2d629 100644
--- a/src/third_party/wiredtiger/src/include/msvc.h
+++ b/src/third_party/wiredtiger/src/include/msvc.h
@@ -13,8 +13,21 @@
 
 #define	inline __inline
 
-#define	WT_GCC_ATTRIBUTE(x)
+/*
+ * Add MSVC-specific attributes and pragmas to types and function declarations.
+ */
+#define	WT_COMPILER_TYPE_ALIGN(x)	__declspec(align(x))
+
+#define	WT_PACKED_STRUCT_BEGIN(name)					\
+	__pragma(pack(push,1))						\
+	struct name {
+
+#define	WT_PACKED_STRUCT_END						\
+	};								\
+	__pragma(pack(pop))
+
 #define	WT_GCC_FUNC_ATTRIBUTE(x)
+#define	WT_GCC_FUNC_DECL_ATTRIBUTE(x)
 
 #define	__WT_ATOMIC_ADD(v, val, n, s, t)				\
 	(WT_STATIC_ASSERT(sizeof(v) == (n)),				\
diff --git a/src/third_party/wiredtiger/src/include/mutex.h b/src/third_party/wiredtiger/src/include/mutex.h
index c5b7587303d..07aa740c525 100644
--- a/src/third_party/wiredtiger/src/include/mutex.h
+++ b/src/third_party/wiredtiger/src/include/mutex.h
@@ -68,15 +68,15 @@ struct __wt_rwlock {
 
 #if SPINLOCK_TYPE == SPINLOCK_GCC
 
-typedef volatile int
-    WT_SPINLOCK WT_GCC_ATTRIBUTE((aligned(WT_CACHE_LINE_ALIGNMENT)));
+typedef volatile int WT_COMPILER_TYPE_ALIGN(WT_CACHE_LINE_ALIGNMENT)
+    WT_SPINLOCK;
 
 #elif SPINLOCK_TYPE == SPINLOCK_PTHREAD_MUTEX ||\
 	SPINLOCK_TYPE == SPINLOCK_PTHREAD_MUTEX_ADAPTIVE ||\
 	SPINLOCK_TYPE == SPINLOCK_MSVC ||\
 	SPINLOCK_TYPE == SPINLOCK_PTHREAD_MUTEX_LOGGING
 
-typedef struct {
+typedef WT_COMPILER_TYPE_ALIGN(WT_CACHE_LINE_ALIGNMENT) struct {
 	wt_mutex_t lock;
 
 	uint64_t counter;		/* Statistics: counter */
@@ -85,7 +85,7 @@ typedef struct {
 	int8_t id;			/* Statistics: current holder ID */
 
 	int8_t initialized;		/* Lock initialized, for cleanup */
-} WT_SPINLOCK WT_GCC_ATTRIBUTE((aligned(WT_CACHE_LINE_ALIGNMENT)));
+} WT_SPINLOCK;
 
 #else
 
diff --git a/src/third_party/wiredtiger/src/include/serial.i b/src/third_party/wiredtiger/src/include/serial.i
index fb610383a75..b42b792f5a7 100644
--- a/src/third_party/wiredtiger/src/include/serial.i
+++ b/src/third_party/wiredtiger/src/include/serial.i
@@ -245,6 +245,9 @@ __wt_update_serial(WT_SESSION_IMPL *session, WT_PAGE *page,
 	 */
 	__wt_cache_page_inmem_incr(session, page, upd_size);
 
+	/* Mark the page dirty after updating the footprint. */
+	__wt_page_modify_set(session, page);
+
 	/*
 	 * If there are subsequent WT_UPDATE structures, we're evicting pages
 	 * and the page-scanning mutex isn't held, discard obsolete WT_UPDATE
@@ -264,8 +267,5 @@ __wt_update_serial(WT_SESSION_IMPL *session, WT_PAGE *page,
 			__wt_update_obsolete_free(session, page, obsolete);
 	}
 
-	/* Mark the page dirty after updating the footprint. */
-	__wt_page_modify_set(session, page);
-
 	return (0);
 }
diff --git a/src/third_party/wiredtiger/src/include/session.h b/src/third_party/wiredtiger/src/include/session.h
index c2ed3473dfb..909f1daf5a4 100644
--- a/src/third_party/wiredtiger/src/include/session.h
+++ b/src/third_party/wiredtiger/src/include/session.h
@@ -42,7 +42,7 @@ struct __wt_hazard {
  * WT_SESSION_IMPL --
  *	Implementation of WT_SESSION.
  */
-struct __wt_session_impl {
+struct WT_COMPILER_TYPE_ALIGN(WT_CACHE_LINE_ALIGNMENT) __wt_session_impl {
 	WT_SESSION iface;
 
 	void	*lang_private;		/* Language specific private storage */
@@ -190,4 +190,4 @@ struct __wt_session_impl {
 	uint32_t   hazard_size;		/* Allocated slots in hazard array. */
 	uint32_t   nhazard;		/* Count of active hazard pointers */
 	WT_HAZARD *hazard;		/* Hazard pointer array */
-} WT_GCC_ATTRIBUTE((aligned(WT_CACHE_LINE_ALIGNMENT)));
+};
diff --git a/src/third_party/wiredtiger/src/include/txn.h b/src/third_party/wiredtiger/src/include/txn.h
index 8380e55effb..c1c4703316b 100644
--- a/src/third_party/wiredtiger/src/include/txn.h
+++ b/src/third_party/wiredtiger/src/include/txn.h
@@ -25,10 +25,10 @@
 
 #define	WT_SESSION_TXN_STATE(s) (&S2C(s)->txn_global.states[(s)->id])
 
-struct __wt_txn_state {
+struct WT_COMPILER_TYPE_ALIGN(WT_CACHE_LINE_ALIGNMENT) __wt_txn_state {
 	volatile uint64_t id;
 	volatile uint64_t snap_min;
-} WT_GCC_ATTRIBUTE((aligned(WT_CACHE_LINE_ALIGNMENT)));
+};
 
 struct __wt_txn_global {
 	volatile uint64_t current;	/* Current transaction ID. */
diff --git a/src/third_party/wiredtiger/src/include/wt_internal.h b/src/third_party/wiredtiger/src/include/wt_internal.h
index 1b3a9b62626..576827bebcd 100644
--- a/src/third_party/wiredtiger/src/include/wt_internal.h
+++ b/src/third_party/wiredtiger/src/include/wt_internal.h
@@ -36,7 +36,9 @@ extern "C" {
 #include <io.h>
 #endif
 #include <limits.h>
-#ifndef _WIN32
+#ifdef _WIN32
+#include <process.h>
+#else
 #include <pthread.h>
 #endif
 #ifdef HAVE_PTHREAD_NP_H
diff --git a/src/third_party/wiredtiger/src/reconcile/rec_track.c b/src/third_party/wiredtiger/src/reconcile/rec_track.c
index c5c72391248..2533ad9e201 100644
--- a/src/third_party/wiredtiger/src/reconcile/rec_track.c
+++ b/src/third_party/wiredtiger/src/reconcile/rec_track.c
@@ -335,12 +335,12 @@ __ovfl_reuse_wrapup(WT_SESSION_IMPL *session, WT_PAGE *page)
 	 * fixing up skiplist links.
 	 */
 	for (i = WT_SKIP_MAXDEPTH - 1; i > 0; --i)
-		for (e = &head[i]; *e != NULL;) {
-			if (F_ISSET(*e, WT_OVFL_REUSE_INUSE)) {
-				e = &(*e)->next[i];
+		for (e = &head[i]; (reuse = *e) != NULL;) {
+			if (F_ISSET(reuse, WT_OVFL_REUSE_INUSE)) {
+				e = &reuse->next[i];
 				continue;
 			}
-			*e = (*e)->next[i];
+			*e = reuse->next[i];
 		}
 
 	/*
@@ -359,19 +359,20 @@ __ovfl_reuse_wrapup(WT_SESSION_IMPL *session, WT_PAGE *page)
 		if (F_ISSET(reuse, WT_OVFL_REUSE_INUSE)) {
 			F_CLR(reuse,
 			    WT_OVFL_REUSE_INUSE | WT_OVFL_REUSE_JUST_ADDED);
-			e = &(*e)->next[0];
+			e = &reuse->next[0];
 			continue;
 		}
-		*e = (*e)->next[0];
+		*e = reuse->next[0];
 
 		WT_ASSERT(session, !F_ISSET(reuse, WT_OVFL_REUSE_JUST_ADDED));
-		decr += WT_OVFL_SIZE(reuse, WT_OVFL_REUSE);
 
 		if (WT_VERBOSE_ISSET(session, WT_VERB_OVERFLOW))
 			WT_RET(
 			    __ovfl_reuse_verbose(session, page, reuse, "free"));
+
 		WT_RET(bm->free(
 		    bm, session, WT_OVFL_REUSE_ADDR(reuse), reuse->addr_size));
+		decr += WT_OVFL_SIZE(reuse, WT_OVFL_REUSE);
 		__wt_free(session, reuse);
 	}
 
@@ -404,12 +405,12 @@ __ovfl_reuse_wrapup_err(WT_SESSION_IMPL *session, WT_PAGE *page)
 	 * fixing up skiplist links.
 	 */
 	for (i = WT_SKIP_MAXDEPTH - 1; i > 0; --i)
-		for (e = &head[i]; *e != NULL;) {
-			if (!F_ISSET(*e, WT_OVFL_REUSE_JUST_ADDED)) {
-				e = &(*e)->next[i];
+		for (e = &head[i]; (reuse = *e) != NULL;) {
+			if (!F_ISSET(reuse, WT_OVFL_REUSE_JUST_ADDED)) {
+				e = &reuse->next[i];
 				continue;
 			}
-			*e = (*e)->next[i];
+			*e = reuse->next[i];
 		}
 
 	/*
@@ -420,17 +421,17 @@ __ovfl_reuse_wrapup_err(WT_SESSION_IMPL *session, WT_PAGE *page)
 	for (e = &head[0]; (reuse = *e) != NULL;) {
 		if (!F_ISSET(reuse, WT_OVFL_REUSE_JUST_ADDED)) {
 			F_CLR(reuse, WT_OVFL_REUSE_INUSE);
-			e = &(*e)->next[0];
+			e = &reuse->next[0];
 			continue;
 		}
-		*e = (*e)->next[0];
+		*e = reuse->next[0];
 
 		if (WT_VERBOSE_ISSET(session, WT_VERB_OVERFLOW))
 			WT_RET(
 			    __ovfl_reuse_verbose(session, page, reuse, "free"));
+
 		WT_TRET(bm->free(
 		    bm, session, WT_OVFL_REUSE_ADDR(reuse), reuse->addr_size));
-
 		decr += WT_OVFL_SIZE(reuse, WT_OVFL_REUSE);
 		__wt_free(session, reuse);
 	}
@@ -722,26 +723,26 @@ __ovfl_txnc_wrapup(WT_SESSION_IMPL *session, WT_PAGE *page)
 	for (i = WT_SKIP_MAXDEPTH - 1; i > 0; --i)
 		for (e = &head[i]; (txnc = *e) != NULL;) {
 			if (TXNID_LE(oldest_txn, txnc->current)) {
-				e = &(*e)->next[i];
+				e = &txnc->next[i];
 				continue;
 			}
-			*e = (*e)->next[i];
+			*e = txnc->next[i];
 		}
 
 	/* Second, discard any no longer needed transaction-cache records. */
 	decr = 0;
 	for (e = &head[0]; (txnc = *e) != NULL;) {
 		if (TXNID_LE(oldest_txn, txnc->current)) {
-			e = &(*e)->next[0];
+			e = &txnc->next[0];
 			continue;
 		}
-		*e = (*e)->next[0];
-
-		decr += WT_OVFL_SIZE(txnc, WT_OVFL_TXNC);
+		*e = txnc->next[0];
 
 		if (WT_VERBOSE_ISSET(session, WT_VERB_OVERFLOW))
 			WT_RET(
 			    __ovfl_txnc_verbose(session, page, txnc, "free"));
+
+		decr += WT_OVFL_SIZE(txnc, WT_OVFL_TXNC);
 		__wt_free(session, txnc);
 	}
 
diff --git a/src/third_party/wiredtiger/src/reconcile/rec_write.c b/src/third_party/wiredtiger/src/reconcile/rec_write.c
index 0300596f90b..be66309c77f 100644
--- a/src/third_party/wiredtiger/src/reconcile/rec_write.c
+++ b/src/third_party/wiredtiger/src/reconcile/rec_write.c
@@ -440,8 +440,11 @@ __wt_reconcile(WT_SESSION_IMPL *session,
 	 * Root pages are special, splits have to be done, we can't put it off
 	 * as the parent's problem any more.
 	 */
-	if (__wt_ref_is_root(ref))
-		return (__rec_root_write(session, page, flags));
+	if (__wt_ref_is_root(ref)) {
+		WT_WITH_PAGE_INDEX(session,
+		    ret = __rec_root_write(session, page, flags));
+		return (ret);
+	}
 
 	/*
 	 * Otherwise, mark the page's parent dirty.
@@ -504,6 +507,7 @@ __rec_root_write(WT_SESSION_IMPL *session, WT_PAGE *page, uint32_t flags)
 	WT_ILLEGAL_VALUE(session);
 	}
 
+	WT_ASSERT(session, session->split_gen != 0);
 	pindex = WT_INTL_INDEX_COPY(next);
 	for (i = 0; i < mod->mod_multi_entries; ++i) {
 		WT_ERR(__wt_multi_to_ref(session,
@@ -2895,7 +2899,7 @@ __wt_bulk_init(WT_SESSION_IMPL *session, WT_CURSOR_BULK *cbulk)
 		WT_RET_MSG(session, EINVAL,
 		    "bulk-load is only possible for newly created trees");
 
-	/* Set a reference to the empty leaf page. */
+	/* Get a reference to the empty leaf page. */
 	pindex = WT_INTL_INDEX_COPY(btree->root.page);
 	cbulk->ref = pindex->index[0];
 	cbulk->leaf = cbulk->ref->page;
@@ -4005,7 +4009,6 @@ __rec_row_int(WT_SESSION_IMPL *session, WT_RECONCILE *r, WT_PAGE *page)
 		WT_ERR(__rec_child_modify(session, r, ref, &hazard, &state));
 		addr = ref->addr;
 		child = ref->page;
-		vtype = 0;
 
 		/* Deleted child we don't have to write. */
 		if (state == WT_CHILD_IGNORE) {
@@ -4023,10 +4026,6 @@ __rec_row_int(WT_SESSION_IMPL *session, WT_RECONCILE *r, WT_PAGE *page)
 			continue;
 		}
 
-		/* Deleted child requiring a proxy cell. */
-		if (state == WT_CHILD_PROXY)
-			vtype = WT_CELL_ADDR_DEL;
-
 		/*
 		 * Modified child.  Empty pages are merged into the parent and
 		 * discarded.
@@ -4076,22 +4075,22 @@ __rec_row_int(WT_SESSION_IMPL *session, WT_RECONCILE *r, WT_PAGE *page)
 
 		/*
 		 * Build the value cell, the child page's address.  Addr points
-		 * to an on-page cell or an off-page WT_ADDR structure.   The
-		 * cell type has been set in the case of page deletion requiring
+		 * to an on-page cell or an off-page WT_ADDR structure. There's
+		 * a special cell type in the case of page deletion requiring
 		 * a proxy cell, otherwise use the information from the addr or
 		 * original cell.
 		 */
 		if (__wt_off_page(page, addr)) {
 			p = addr->addr;
 			size = addr->size;
-			if (vtype == 0)
-				vtype = __rec_vtype(addr);
+			vtype = state == WT_CHILD_PROXY ?
+			    WT_CELL_ADDR_DEL : __rec_vtype(addr);
 		} else {
 			__wt_cell_unpack(ref->addr, vpack);
 			p = vpack->data;
 			size = vpack->size;
-			if (vtype == 0)
-				vtype = vpack->raw;
+			vtype = state == WT_CHILD_PROXY ?
+			    WT_CELL_ADDR_DEL : (u_int)vpack->raw;
 		}
 		__rec_cell_build_addr(r, p, size, vtype, 0);
 		CHILD_RELEASE_ERR(session, hazard, ref);