Import wiredtiger-wiredtiger-2.8.0-134-g5047aab.tar.gz from wiredtiger branch mongodb-3.4

ref: 9cf8eb2..5047aab

SERVER-23504  Coverity analysis defect 98177: Resource leak
WT-2330       in-memory configurations should not create on-disk collection files
WT-2513       conversion from 'int64_t' to 'uint32_t'
WT-2522       Incorrect format code in message
WT-2525       in-memory configurations: miscellaneous cleanups
WT-2527       OS X compile error, missing POSIX_FADV_WILLNEED #define
WT-2528       style error in WiredTiger build
WT-2529       The readonly test case is crashing with a stack overflow
WT-2531       in-memory tables are allocating unnecessary memory
WT-2532       WT_STREAM_APPEND and WT_STREAM_LINE_BUFFER flag overlap
WT-2533       Ensure that in-memory tables don't report a zero size
SERVER-23517  WiredTiger changes for MongoDB 3.3.5

1 files changed, 374 insertions, 219 deletions

diff --git a/src/third_party/wiredtiger/NEWS b/src/third_party/wiredtiger/NEWS
index 546d08b2418..af8b15488cc 100644
--- a/src/third_party/wiredtiger/NEWS
+++ b/src/third_party/wiredtiger/NEWS
@@ -1,3 +1,159 @@
+WiredTiger release 2.8.0, 2015-03-24
+------------------------------------
+
+The WiredTiger 2.8.0 release contains new features, new supported platforms,
+minor API changes and bug fixes.
+
+New features and API changes; refer to the API documentation for full details:
+
+* WT-60         Port WiredTiger to run on big endian platforms
+* WT-2287       Add a new WT_SESSION.rebalance API
+* WT-2333       Add a lock_wait configuration setting to WT_SESSION.drop to avoid blocking
+* WT-2349       Add a readonly configuration setting to wiredtiger_open
+* WT-2363       Remove built in support for bzip2 compression
+* WT-2404       Add streaming pack/unpack methods to the extension API
+
+Significant changes and bug fixes:
+
+* WT-1801       Add a directory sync after rollback of a WT_SESSION::rename operation
+* WT-2130       Improve on-disk page utilization with random workloads
+* WT-2275       Fix a database corruption after truncate and crash
+* WT-2264       High update workloads can cause checkpoints to never complete
+* WT-2290       Improve effectiveness of WT_SESSION.compact
+* WT-2361       Fix a bug in column-store where verify identifies out of order data
+* WT-2367       Fix a bug in WT_CURSOR.next that could cause out-of-order key returns
+* WT-2374       Fix a bug where a database was corrupted when restoring a backup
+* WT-2381       Fix the dump utility to include the table configuration
+* WT-2451       Allow the WiredTiger metadata to be evicted
+* WT-2490       Fix a bug in column-store where search_near() returns the wrong key
+
+Issues fixed in MongoDB:
+
+* SERVER-21619  sys-perf: WT crash during core_workloads_WT execution
+* SERVER-21833  Enhance WT_SESSION::compact to more reliably release space
+* SERVER-21887  Enhance $sample to be faster on newly created collection
+* SERVER-22676  Allow WiredTiger to open databases created by 3.0.0 or 3.0.1
+* SERVER-22773  New CRC32 implementation on PowerPC
+* SERVER-22831  Low query rate with heavy cache pressure and an idle collection
+
+Other noteworthy changes since the previous release:
+
+* WT-1517       Fix error handling around schema format edge cases
+* WT-2060       Simplify aggregation of statistics
+* WT-2073       Metadata cleanups
+* WT-2099       Seeing memory underflow messages
+* WT-2107       Add example code including an event handler
+* WT-2113       Truncate test occasionally fails with unexpected EBUSY
+* WT-2123       Don't clear allocated memory if not required
+* WT-2173       Fix some cases where tiny caches could get stuck full
+* WT-2177       Add an optional per-thread seed to random number generator
+* WT-2198       Bulk load and column store appends
+* WT-2215       WT_LSN needs to support atomic reads and updates
+* WT-2216       Simplify row-store search loop slightly
+* WT-2231       Pinned page cursor searches could check parent keys
+* WT-2235       Add a unicode option to WiredTiger printlog utility
+* WT-2242       WiredTiger treats dead trees the same as other trees in eviction
+* WT-2246       Improve performance for column-store append searches
+* WT-2247       Variable-length column-store in-memory page splits
+* WT-2258       Stop WiredTiger pre-loading pages when direct-IO is configured
+* WT-2259       Fix error handling when getting exclusive access to a btree
+* WT-2262       Fix random cursor next so it is not skewed by tree shape
+* WT-2265       WiredTiger related change in PowerPC specific code block in gcc.h
+* WT-2272       Fix a bug in the sweep server that triggered an assertion
+* WT-2276       Add a tool to decode checkpoint addr
+* WT-2277       Remove WT check against big-endian systems
+* WT-2279       Define WT_PAUSE(), WT_FULL_BARRIER(), etc when s390x is defined
+* WT-2280       Add CRC32 Optimized code for PowerPC
+* WT-2282       Error in wt_txn_update_oldest verbose message test
+* WT-2283       Retry in txn_update_oldest results in a hang
+* WT-2285       Enhance configure to set BUFFER_ALIGNMENT_DEFAULT to 4kb on Linux
+* WT-2289       Fix a bug in btree search when doing a fast key check
+* WT-2291       Random cursor walk inefficient in skip list only trees
+* WT-2295       WT_SESSION.create does a full-scan of the main table
+* WT-2296       Improve log algorithm for sync/flush settings
+* WT-2297       Fix off-by-one error in Huffman config file parsing
+* WT-2299       Clean up layering violation between btree and block manager code
+* WT-2307       Fix a bug where internal page splits can corrupt cursor iteration
+* WT-2308       Add support for custom extractor for ref_cursors in join cursor
+* WT-2311       Add support for UltraSparc platform
+* WT-2312       Fix a bug where re-creating a deleted column-store page can corrupt the in-memory tree
+* WT-2313       Fix a bug in the sweep server
+* WT-2314       Update page-swap error handling so that it is consistent
+* WT-2316       Fix a bug in WT_CURSOR.prev where it could return keys out-of-order
+* WT-2318       Enhance condition wait implementation to use less CPU on idle databases
+* WT-2321       Fix a race between eviction and worker threads on the eviction queue
+* WT-2322       Fix a bug in read-uncommitted join cursors where using Bloom filters is unsafe
+* WT-2328       Update schema drop does to use the block manager interface for file removal
+* WT-2331       Checking of search result for reference cursors before join
+* WT-2332       Fix a bug in logging write-no-sync mode
+* WT-2335       Fix a bug where parsing an invalid configuration string could segfault
+* WT-2338       Disable using pre-allocated log files when a backup cursor is open
+* WT-2339       Fix a bug in rebalance that caused database verification failure
+* WT-2340       Add logging guarantee assertions
+* WT-2345       Avoid creating tiny pages on disk when evicting small pages from cache
+* WT-2346       Enhance checkpoint implementation so the schema lock is not held during I/O
+* WT-2347       Fix some schema format edge cases in Java API
+* WT-2352       Allow build and test without requiring lz4
+* WT-2355       Fix minor scratch buffer usage in logging
+* WT-2356       log scan advances to next log file on partially written record
+* WT-2368       Fix a bug where row-store can pass invalid keys to collator functions
+* WT-2369       Use C compiler to detect headers instead of C++ compiler
+* WT-2371       Fix a bug where parent split cannot access the page after page-index swap
+* WT-2372       WiredTiger windows builder fails with C4005 against the "inline" macro
+* WT-2375       Add tests for custom collators
+* WT-2378       Fix a hang in LSM when doing forced drop with the no wait option
+* WT-2382       Fix a bug in join cursors with custom collator for 'u' format
+* WT-2384       Fix a bug in join cursors where lt, le conditions for ordering could be wrong
+* WT-2387       Fix cursor random unit test on Windows
+* WT-2390       Fix the OS X build
+* WT-2391       Enhance eviction so that it is less likely to evict pages from indexes
+* WT-2394       Fix a bug in compact that meant we didn't always reclaim available space
+* WT-2395       Fix a recovery failure with an LSM tree
+* WT-2396       Fix a deadlock between table drop and checkpoint
+* WT-2397       Fix a bug in cursor traversal where doing a reverse walk could skip records.
+* WT-2399       Add test case that verifies cursor traversal
+* WT-2409       Fix a minor performance regression in LSM
+* WT-2410       Stop casting function pointers to different types
+* WT-2411       Fix a hang in LSM related to dropping tables
+* WT-2414       Avoid extractor calls for ordering cursor in join cursor
+* WT-2417       Windows Jenkins task is failing
+* WT-2418       Fix a bug in WT_SESSION.rebalance where it could return EBUSY
+* WT-2420       Fix a bug in LSM where recovery from a backup could fail
+* WT-2423       Fix a bug in session reference counting on error handling
+* WT-2425       Fix a performance regression in wtperf evict-btree read workload
+* WT-2426       Fix a deadlock caused by recent changes to checkpoint handle locking
+* WT-2428       Make statistics logging compatible with MongoDB
+* WT-2429       Add a statistic that tracks aggressive mode in eviction
+* WT-2430       Add statistics for join cursor
+* WT-2432       Fix a performance regression on LSM and read only workloads
+* WT-2433       Allow read-only databases to log statistics
+* WT-2434       Fix a race between force-drop and sweep
+* WT-2436       Fix a bug in join cursors with lt, le conditions and "strategy=bloom"
+* WT-2438       Extend WiredTiger stat declarations to help external tools
+* WT-2440       Fix a bug in the PowerPC checksum implementation
+* WT-2443       Add statistics for all indexes used in join cursor
+* WT-2447       Enhance join cursor implementation to avoid reading main table where possible
+* WT-2448       Add no_scale flag to relevant statistics
+* WT-2449       Enhance configure to check for a 64-bit build
+* WT-2454       Fix checkpoint_sync=false behavior to prevent flushes/sync to disk
+* WT-2456       Fix PowerPC CRC32 Code
+* WT-2457       Fix a bug where dropping an LSM table can return EBUSY when no user ops are active
+* WT-2459       Allow configure to use the --tag option for libtool when compiling on PowerPC
+* WT-2460       Fix a bug where checkpoint could fail with WT_ROLLBACK
+* WT-2471       Update WiredTiger printf formats to be platform aware
+* WT-2476       Fix a race where btree->evict_lock is being accessed after being destroyed
+* WT-2481       Fix a recently introduced performance regression in LSM
+* WT-2483       Make read only testing more robust
+* WT-2485       Fix a test/format failure with floating point exception
+* WT-2492       Fix a bug in Windows where we used the different memory allocators accidentally
+* WT-2495       Missing memory initialization leads to crash on Windows
+* WT-2496       Fix a bug revealed by test/format unable to read root page
+* WT-2497       Enhance test/format to save a copy of backup
+* WT-2498       Fix a bug in LSM tree drop where it could hang when a user cursor is open
+* WT-2499       Fix a bug in LSM shutdown where a race condition causes a segfault
+* WT-2501       Fix a bug where dropping a just opened LSM tree isn't thread safe
+* WT-2502       Fix a memory leak in locking handles for checkpoint
+
 WiredTiger release 2.7.0, 2015-12-08
 ------------------------------------
 
@@ -6,222 +162,221 @@ fixes.
 
 New features and API changes; refer to the API documentation for full details:
 
-* 959376c  WT-147: Create indexes on non-empty tables.
-* 4368d39  WT-1315: Add an implementation of cursor joins via a new WT_SESSION::join API.
-* 944ccd1  WT-1350: Add a new configuration option to ::wiredtiger_open and
-  WT_CONNECTION::reconfigure called "eviction_dirty_trigger" that causes eviction to start evicting
-  dirty pages from cache once the given threshold has been reached.
-* ab5a8fb  WT-1728: Add a WT_SESSION::reset method to release resources held by a session.
-* 263c5b7  WT-1930: Allow setting "file_manager=(close_idle_time=0)" to ::wiredtiger_open and
-  WT_CONNECTION::reconfigure to disable closing idle handles.
-* 6310c3f  WT-1959: Change verify to distinguish between warnings and errors. Add a new strict mode
-  to verify that causes warnings to be reported as errors. Use strict mode to match earlier
-  behavior. See the upgrading documentation for more information.
-* e0d6229  WT-1980: Add a new "metadata:create" URI to WT_SESSION::open_cursor for metadata cursors
-  that return strings useful for passing to WT_SESSION::create.
-* 292712e  WT-2065: Add a new configuration option to ::wiredtiger_open and
-  WT_CONNECTION::reconfigure called "shared_cache=(quota)" that limits the amount of shared cache a
-  participant can be assigned.
-* 4d0ebf4  WT-2104: Add a method to flush log files via a new WT_SESSION::log_flush API. Made
-  WT_SESSION::commit_transaction configuration options match WT_SESSION::log_flush. Change the
-  default WT_SESSION::transaction_sync timeout to 20 minutes rather than infinity.
-* 21b8330  WT-2151: Enhance logging configuration to allow reconfiguration and add a new
-  "log=(zero_fill)" configuration option that causes WiredTiger to zero-fill log files on creation.
-* 368b307  WT-2200: Add a new configuration option to ::wiredtiger_open called "write_through" that
-  causes WiredTiger to specify the FILE_FLAG_WRITE_THROUGH on Windows when writing files (default
-  false, including when "direct_io" is configured).
-* 08c0fcd  WT-2217: After a successful call to WT_CURSOR::insert, the key and value will be
-  cleared from the cursor. See the upgrading documentation for more information.
-* d4fc69a  SERVER-17078: Add a "statistics=(size)" mode to statistics cursors, which allows for
-  retrieving file size only.
-* b83b901  SERVER-18356: Changed the handling of the "config_base" option to ::wiredtiger_open. See
-  upgrading documentation for more information.
+* WT-147  Create indexes on non-empty tables.
+* WT-1315 Add an implementation of cursor joins via a new WT_SESSION::join API.
+* WT-1350 Add a new configuration option to ::wiredtiger_open and
+          WT_CONNECTION::reconfigure called "eviction_dirty_trigger" that causes eviction to start
+          evicting dirty pages from cache once the given threshold has been reached.
+* WT-1728 Add a WT_SESSION::reset method to release resources held by a session.
+* WT-1930 Allow setting "file_manager=(close_idle_time=0)" to ::wiredtiger_open and
+          WT_CONNECTION::reconfigure to disable closing idle handles.
+* WT-1959 Change verify to distinguish between warnings and errors. Add a new strict mode
+          to verify that causes warnings to be reported as errors. Use strict mode to match earlier
+          behavior. See the upgrading documentation for more information.
+* WT-1980 Add a new "metadata:create" URI to WT_SESSION::open_cursor for metadata cursors
+          that return strings useful for passing to WT_SESSION::create.
+* WT-2065 Add a new configuration option to ::wiredtiger_open and
+          WT_CONNECTION::reconfigure called "shared_cache=(quota)" that limits the amount of shared
+          cache a participant can be assigned.
+* WT-2104 Add a method to flush log files via a new WT_SESSION::log_flush API. Made
+          WT_SESSION::commit_transaction configuration options match WT_SESSION::log_flush. Change
+          the default WT_SESSION::transaction_sync timeout to 20 minutes rather than infinity.
+* WT-2151 Enhance logging configuration to allow reconfiguration and add a new "log=(zero_fill)"
+          configuration option that causes WiredTiger to zero-fill log files on creation.
+* WT-2200 Add a new configuration option to ::wiredtiger_open called "write_through" that
+          causes WiredTiger to specify the FILE_FLAG_WRITE_THROUGH on Windows when writing files
+          (default false, including when "direct_io" is configured).
+* WT-2217 After a successful call to WT_CURSOR::insert, the key and value will be
+          cleared from the cursor. See the upgrading documentation for more information.
+* SERVER-17078 Add a "statistics=(size)" mode to statistics cursors, which allows for
+          retrieving file size only.
+* SERVER-18356 Changed the handling of the "config_base" option to ::wiredtiger_open. See
+          upgrading documentation for more information.
 
 
 The following statistics were removed:
 
-* f1ed3b9  WT-1481: connection dhandles swept.
-* f1ed3b9  WT-1481: connection candidate referenced.
-* 4ba4518  WT-1481: failed to find a slot large enough for record.
-* 28563af  WT-1989: log buffer size increases.
-* f81c70d  WT-1989: slots selected for switching that were unavailable.
-* df4f69c  WT-2094: log records written directly.
-* df4f69c  WT-2094: record size exceeded maximum.
-* d68e078  WT-2182: pages split during eviction.
+* WT-1481 connection dhandles swept.
+* WT-1481 connection candidate referenced.
+* WT-1481 failed to find a slot large enough for record.
+* WT-1989 log buffer size increases.
+* WT-1989 slots selected for switching that were unavailable.
+* WT-2094 log records written directly.
+* WT-2094 record size exceeded maximum.
+* WT-2182 pages split during eviction.
 
 Lookaside table:
 
-* 6a5a461  WT-1967: Allow eviction of updates required by old readers.
-* 87592ec  WT-2074: Fix a race between lookaside table reconciliation and checkpoints.
-* 0390b29  WT-2149: Fix the order of creation of the lookaside table.
-* 7518a69  WT-2190: Fix transaction visibility test that is applied to the lookaside table.
-* 2cf57a6  SERVER-21585: Don't use the lookaside file until the cache is stuck full.
+* WT-1967 Allow eviction of updates required by old readers.
+* WT-2074 Fix a race between lookaside table reconciliation and checkpoints.
+* WT-2149 Fix the order of creation of the lookaside table.
+* WT-2190 Fix transaction visibility test that is applied to the lookaside table.
+* SERVER-21585 Don't use the lookaside file until the cache is stuck full.
 
 Issues fixed in MongoDB:
 
-* d57dc26  SERVER-18829: Have pages start in the middle of the LRU queue for eviction.
-* b847ccc  SERVER-18838: During drops, don't remove files until the metadata is durable.
-* 8f7da9a  SERVER-18875: Clean up deleted pages.
-* d04083d  SERVER-18899: Add unit test to simulate fsyncLock.
-* 3ec45a7  SERVER-19340: Avoid type aliasing in the random number generator.
-* 907c0ca  SERVER-19445: Have the oldest transaction update the oldest tracked ID.
-* fb8739f  SERVER-19522: Try to evict internal pages with no useful child pages.
-* 4545a8b  SERVER-19573: Change row-store inserts to avoid page locking.
-* b52d2d3  SERVER-19751: Retry pthread_create on EAGAIN or EINTR.
-* 46b4ad5  SERVER-19954: Don't scan tracked handles during checkpoints.
-* 65abd20  SERVER-19989: Add a write barrier before data handles are added to shared lists.
-* 3e46e79  SERVER-19990: Don't assert on eviction of live updates from dead trees.
-* 38dad39  SERVER-20008: Don't reset eviction walks when hitting a busy page.
-* 3b72361  SERVER-20159: Make all readers wait while the cache is full.
-* 8be547b  SERVER-20193: Fix obsolete transaction check.
-* ad56c6a  SERVER-20303: Tune in-memory splits when inserting large objects.
-* 7505a02  SERVER-20385: Make WT_CURSOR::next(random) more random.
-* 35d46c3  SERVER-21027: Reverse split if there are many deleted pages.
-* a6da10e  SERVER-21553: Enable fast-path truncate after splits.
-* 890ee34  SERVER-21619: Don't do internal page splits after a tree is marked DEAD.
-* 0e93d60  SERVER-21691: Avoid insert stalls.
+* SERVER-18829 Have pages start in the middle of the LRU queue for eviction.
+* SERVER-18838 During drops, don't remove files until the metadata is durable.
+* SERVER-18875 Clean up deleted pages.
+* SERVER-18899 Add unit test to simulate fsyncLock.
+* SERVER-19340 Avoid type aliasing in the random number generator.
+* SERVER-19445 Have the oldest transaction update the oldest tracked ID.
+* SERVER-19522 Try to evict internal pages with no useful child pages.
+* SERVER-19573 Change row-store inserts to avoid page locking.
+* SERVER-19751 Retry pthread_create on EAGAIN or EINTR.
+* SERVER-19954 Don't scan tracked handles during checkpoints.
+* SERVER-19989 Add a write barrier before data handles are added to shared lists.
+* SERVER-19990 Don't assert on eviction of live updates from dead trees.
+* SERVER-20008 Don't reset eviction walks when hitting a busy page.
+* SERVER-20159 Make all readers wait while the cache is full.
+* SERVER-20193 Fix obsolete transaction check.
+* SERVER-20303 Tune in-memory splits when inserting large objects.
+* SERVER-20385 Make WT_CURSOR::next(random) more random.
+* SERVER-21027 Reverse split if there are many deleted pages.
+* SERVER-21553 Enable fast-path truncate after splits.
+* SERVER-21619 Don't do internal page splits after a tree is marked DEAD.
+* SERVER-21691 Avoid insert stalls.
 
 Other note worthy changes since the previous release:
 
-* bc2aa57  WT-1744: Throttle worker threads based on eviction targets.
-* 55a989e  WT-1845: Allow read only transactions to commit after failure.
-* df625dc  WT-1869: Avoid doing in memory splits while checkpointing a tree.
-* ddac54f  WT-1942: Add atomic implementations for PPC64 architecture.
-* 3866fa6  WT-1962: Make the hot_backup_lock a read/write lock.
-* 58f9e99  WT-1963: Fix backup cursor Java API.
-* 4e0fe59  WT-1964: Fix a bug in the Java API when closing handles from a different thread.
-* 60e2150  WT-1966: Change how the shared cache assigns priority to participants.
-* 76d2e73  WT-1975: Ensure previous log files are complete for forced sync.
-* e43b22a  WT-1977: Improve performance of getting snapshots with many sessions.
-* 5eaf63e  WT-1978: Better checking and tests for index cursor comparison.
-* 1602a4b  WT-1981: Fix a signed 32-bit integer unpacking bug.
-* cd1704d  WT-1982: Fix a bug where cached overflow items were freed too early.
-* 57a9f38  WT-1985: Integer packing and other fixes for Python and Java.
-* 9897eb2  WT-1986: Fix a race renaming temporary log files.
-* b10bff9  WT-1989: Improve scalability of log writes.
-* f8dc12b  WT-1996: Fix a bug where we would free the fist update during a page rewrite on error.
-* 144a383  WT-1998: Fixes for indexes with some rarely used key/value formats.
-* 8af8b8a  WT-2002: Fix a bug in verify where it would panic when encountering a corrupted file.
-* e1d8bc7  WT-2007: Statically allocate log slot buffers to a maximum size.
-* 911158c  WT-2008: Fix a bug in recovery where a file create went missing.
-* 3e2e7e6  WT-2009: Apply tracked metadata operations post-commit.
-* 1255cb2  WT-2012: Fix a bug updating the oldest ID.
-* ef9d56f  WT-2013: Add gcc asm definitions for ARM64.
-* c8633e6  WT-2014: Fix a bug in checkpoints where files could be flushed in the wrong order.
-* 9b09e69  WT-2015: Fix a bug in error handling during block open.
-* 4938b8d  WT-2017: Once an eviction server thread is started keep it running.
-* 298f86c  WT-2019: Fix a logic bug tracking the maximum transaction ID in clean trees.
-* 7d6075c  WT-2020: Clarify checksum error failure messages.
-* 7b302d3  WT-2021: Fix a bug moving the oldest ID forward (introduced by WT-1967).
-* 9df72d7  WT-2022: Fix a bug not releasing a handle when opening a non-existent index cursor.
-* 81ffc2d  WT-2023: Improve locking primitives: simplify read-write lock operations.
-* 6b84722  WT-2029: Improve scalability of statistics.
-* f97cfe9  WT-2031: Log slot revamp.
-* bee11c3  WT-2032: Improve next_random cursors to work with small trees.
-* cf53696  WT-2034: Improve shared cache balancing algorithm.
-* aee1c94  WT-2035: For index cursors, keep track of which column groups need to be positioned.
-* 36310d4  WT-2036: Make handle sweeps more robust.
-* c948fbb  WT-2037: Only write a checkpoint to the log on close if it wasn't.
-* e25e615  WT-2038: Avoid long scans holding the handle list lock.
-* 75a4655  WT-2039: Add error check and unit test for log records over 4 GB.
-* 5ab26af  WT-2042: Only try to evict tombstones that are visible to all readers.
-* ce223ac  WT-2045: Don't let the eviction server do slow reconciliation, it can stall eviction.
-* 6665618  WT-2046: Add a statistic for search restarts.
-* 98b4a28  WT-2047: Fix a bug in the random generator code to handle an uninitialized state.
-* 258e2e1  WT-2050: Show size with memory allocation errors.
-* 2e1471c  WT-2053: Fix a bug in disk verify messages.
-* e316e61  WT-2056: Reorder btree cursor close so stats are maintained correctly.
-* 70f9100  WT-2057: Remove the verbose configuration when writing the base configuration file.
-* 41b6fb8  WT-2058: Fix an alignment bug in the mutex and log-slot code.
-* d72012b  WT-2059: Include non-aggregated stats in cursor results.
-* 3e0c7bf  WT-2062: Try harder to make progress on in-memory splits.
-* 66757f7  WT-2064: Don't spin indefinitely waiting for the handle list lock in eviction.
-* 8f42f02  WT-2066: Update the oldest transaction ID from eviction.
-* e167592  WT-2068: Protect discarding handles with the handle list lock.
-* fd72a09  WT-2075: Fix a hang in logging with parallel workload.
-* 11c0fa0  WT-2078: Fix a bug in error handling with statistics cursors.
-* 9734d85  WT-2081: Make verify progress reporting less verbose.
-* 6008b41  WT-2085: Run some of the log_server threads operations more frequently.
-* 39a69ec  WT-2086: Add a statistic to track when eviction finds a page that can be split.
-* 334e103  WT-2089: Relax restrictions on multiblock eviction and in-memory splits.
-* f13b788  WT-2090: Fix a bug in the Windows OS layer that swallowed error returns.
-* 83b8db7  WT-2092: Free log condition variables after all threads are joined.
-* d9391c0  WT-2093: Use the C99 bool type to clarify when functions return true/false.
-* f883d27  WT-2094: Eliminate direct write and record unbuffered log records.
-* 9008260  WT-2097: Reintroduce immediate waits when forced eviction is necessary.
-* ff1da28  WT-2100: Rename evict to evict_queue so it's easier to search for.
-* 41db2ee  WT-2101: Don't update the logging ckpt_lsn on clean shutdown.
-* e1d6886  WT-2102: Fix a hang in log slot join when forcing log writes.
-* 0e96683  WT-2105: Fix a bug where we could reference an invalid memory address if a file is
-  corrupted on disk.
-* 6a565bc  WT-2108: Rework in-memory page rewrite support (WT_PM_REC_REWRITE).
-* dcb0ddb  WT-2114: Make application eviction fairer.
-* 10c2f15  WT-2115: Don't skip truncated pages that are part of a checkpoint.
-* cd6ce97  WT-2116: Add diagnostic checks for stuck cache and dump the state.
-* 51cf672  WT-2119: Don't evict clean multiblock pages with overflow items during checkpoints.
-* 346ad40  WT-2126: Clean up if there is an error during splits.
-* 6831485  WT-2127: Deepen the tree more regularly to avoid wide internal pages.
-* a0b5d2b  WT-2128: When decoding huffman encoding during salvage it's possible to have fewer bits
-  than the symbol length during decoding, if the value has been corrupted.
-* 79f74e5  WT-2131: Switch to using a lock to control page splits to avoid starvation.
-* 02a3d9f  WT-2132: Make debug dump function more robust to errors.
-* 8c223e4  WT-2134: Flush all buffered log records in log_flush.
-* d1b5e7f  WT-2135: Fix log_only setting for backup cursor. Fix initialization.
-* aab8101  WT-2137: Check the sync_lsn is in the correct file before moving it forward.
-* 323af84  WT-2139: Fix a transaction visibility bug in read-uncommitted transactions.
-* 751c628  WT-2146: Improve performance when searching for short keys.
-* 62998ce  WT-2148: Fix a compiler warning in encoding functions.
-* 6c16fdd  WT-2153: Fix bug. Now we always need to start the log_server thread.
-* 6a5fca3  WT-2154: Make btree dump safer.
-* 0d74bc6  WT-2155: Remove last use of F_CAS_ATOMIC and the associated macro.
-* cc42bda  WT-2156: Allow eviction workers to restart.
-* bf1d359  WT-2157: Fix a bug where a failed page split could lead to incomplete checkpoints.
-* ce9d265  WT-2159: Don't check the config twice in one path.
-* 544f27d  WT-2162: Add null pointer check, needed after an index is dropped.
-* 0d85ebe  WT-2164: Prevent another LSM chunk checkpoint while the first is still in progress.
-* a81aae8  WT-2165: Stop using FALLOC_FL_KEEP_SIZE flag when pre-allocating files.
-* 2865a76  WT-2167: Switch recovery to using an internal session.
-* 5d4c952  WT-2170: Protect the turtle file with a lock.
-* 497b744  WT-2174: Avoid the table list lock when creating a size only statistics cursor.
-* fdfa804  WT-2178: In-memory storage engine support.
-* b9bd01f  WT-2179: Added decorator to mark txn13 as part of the --long test suite.
-* be544dd  WT-2180: Remove cursor.{search,search-near,remove} key size validation.
-* be412b5  WT-2182: When internal pages grow large enough, split them into their parents.
-* c27e78e  WT-2184: Fix log scan bug when final record has many trailing zeros.
-* 9584be3  WT-2185: Don't do reverse splits when closing a file.
-* f6b12d3  WT-2187: Add flag for flushing a slot.
-* a4545bf  WT-2189: Update flag set and clear macros to be less error prone.
-* 30ab327  WT-2191: In-memory disk image no longer the same as saved updates.
-* 4ba5698  WT-2192: Fix the logic around checking whether internal page is evictable.
-* 2f0b3e2  WT-2193: Handle read-committed metadata checkpoints during snapshot transactions.
-* 9b1febc  WT-2194: Java close callbacks should handle cursors that Java code did not open.
-* 438f455  WT-2195: Fix a hang after giving up on a reverse split.
-* ff27fe9  WT-2196: Fix error handling in size only statistics.
-* 0a1ee34  WT-2199: Fix transaction sync inconsistency.
-* 2ff1fd6  WT-2203: Release an allocated page on error.
-* 3b3cf2a  WT-2204: Don't take a local copy of page->modify until we know the page is dirty.
-* 179d4d0  WT-2206: Change cache operations from flags to an enumeration.
-* 82514ca  WT-2207: Track whenever a session has a handle exclusive.
-* 78bd4ac  WT-2210: Raw compression fails if row-store recovery precedes column-store recovery.
-* c360d53  WT-2212: Add a "use_environment" config to ::wiredtiger_open.
-* a72ddb7  WT-2218: Add truncate stats.
-* ce8c091  WT-2219: Enhancements to in-memory testing.
-* e2f1130  WT-2220: Update time comparison macros.
-* 59857f9  WT-2222: Add statistics for named snapshots.
-* fb9cebe  WT-2224: Track which deleted refs are discarded by a split.
-* cace179  WT-2228: Avoid unnecessary raw-compression calls.
-* 0a52a80  WT-2237: Have threads publish unique transaction IDs so that updates always become
-  visible immediately on commit.
-* 6c7338f  WT-2241: Use a lock to protect transaction ID allocation.
-* 39dfd21  WT-2243: Don't keep transaction IDs pinned for reading from checkpoints.
-* 4c49948  WT-2244: Trigger in-memory splits sooner.
-* 9f2e4f3  WT-2248: WT_SESSION::close is updating WT_CONNECTION_IMPL.default_session.
-* 264ec21  WT-2249: Keep eviction stuck until cache usage is under 100%.
-* dca1411  WT-2250: Minor fix.  Use SET instead of increment for stat.
-* e731ef8  WT-2251: Free addresses when we discard deleted page references.
-* 4fc3e39  WT-2253: Evict pages left behind by in-memory splits.
-* 2df5658  WT-2257: Fixes when given multiple thread workload configurations.
-* 4c49043  WT-2260: Avoid adding internal pages to the eviction queue
+* WT-1744 Throttle worker threads based on eviction targets.
+* WT-1845 Allow read only transactions to commit after failure.
+* WT-1869 Avoid doing in memory splits while checkpointing a tree.
+* WT-1942 Add atomic implementations for PowerPC architecture.
+* WT-1962 Make the hot_backup_lock a read/write lock.
+* WT-1963 Fix backup cursor Java API.
+* WT-1964 Fix a bug in the Java API when closing handles from a different thread.
+* WT-1966 Change how the shared cache assigns priority to participants.
+* WT-1975 Ensure previous log files are complete for forced sync.
+* WT-1977 Improve performance of getting snapshots with many sessions.
+* WT-1978 Better checking and tests for index cursor comparison.
+* WT-1981 Fix a signed 32-bit integer unpacking bug.
+* WT-1982 Fix a bug where cached overflow items were freed too early.
+* WT-1985 Integer packing and other fixes for Python and Java.
+* WT-1986 Fix a race renaming temporary log files.
+* WT-1989 Improve scalability of log writes.
+* WT-1996 Fix a bug where we would free the fist update during a page rewrite on error.
+* WT-1998 Fixes for indexes with some rarely used key/value formats.
+* WT-2002 Fix a bug in verify where it would panic when encountering a corrupted file.
+* WT-2007 Statically allocate log slot buffers to a maximum size.
+* WT-2008 Fix a bug in recovery where a file create went missing.
+* WT-2009 Apply tracked metadata operations post-commit.
+* WT-2012 Fix a bug updating the oldest ID.
+* WT-2013 Add gcc asm definitions for ARM64.
+* WT-2014 Fix a bug in checkpoints where files could be flushed in the wrong order.
+* WT-2015 Fix a bug in error handling during block open.
+* WT-2017 Once an eviction server thread is started keep it running.
+* WT-2019 Fix a logic bug tracking the maximum transaction ID in clean trees.
+* WT-2020 Clarify checksum error failure messages.
+* WT-2021 Fix a bug moving the oldest ID forward (introduced by WT-1967).
+* WT-2022 Fix a bug not releasing a handle when opening a non-existent index cursor.
+* WT-2023 Improve locking primitives: simplify read-write lock operations.
+* WT-2029 Improve scalability of statistics.
+* WT-2031 Log slot revamp.
+* WT-2032 Improve next_random cursors to work with small trees.
+* WT-2034 Improve shared cache balancing algorithm.
+* WT-2035 For index cursors, keep track of which column groups need to be positioned.
+* WT-2036 Make handle sweeps more robust.
+* WT-2037 Only write a checkpoint to the log on close if it wasn't.
+* WT-2038 Avoid long scans holding the handle list lock.
+* WT-2039 Add error check and unit test for log records over 4 GB.
+* WT-2042 Only try to evict tombstones that are visible to all readers.
+* WT-2045 Don't let the eviction server do slow reconciliation, it can stall eviction.
+* WT-2046 Add a statistic for search restarts.
+* WT-2047 Fix a bug in the random generator code to handle an uninitialized state.
+* WT-2050 Show size with memory allocation errors.
+* WT-2053 Fix a bug in disk verify messages.
+* WT-2056 Reorder btree cursor close so stats are maintained correctly.
+* WT-2057 Remove the verbose configuration when writing the base configuration file.
+* WT-2058 Fix an alignment bug in the mutex and log-slot code.
+* WT-2059 Include non-aggregated stats in cursor results.
+* WT-2062 Try harder to make progress on in-memory splits.
+* WT-2064 Don't spin indefinitely waiting for the handle list lock in eviction.
+* WT-2066 Update the oldest transaction ID from eviction.
+* WT-2068 Protect discarding handles with the handle list lock.
+* WT-2075 Fix a hang in logging with parallel workload.
+* WT-2078 Fix a bug in error handling with statistics cursors.
+* WT-2081 Make verify progress reporting less verbose.
+* WT-2085 Run some of the log_server threads operations more frequently.
+* WT-2086 Add a statistic to track when eviction finds a page that can be split.
+* WT-2089 Relax restrictions on multiblock eviction and in-memory splits.
+* WT-2090 Fix a bug in the Windows OS layer that swallowed error returns.
+* WT-2092 Free log condition variables after all threads are joined.
+* WT-2093 Use the C99 bool type to clarify when functions return true/false.
+* WT-2094 Eliminate direct write and record unbuffered log records.
+* WT-2097 Reintroduce immediate waits when forced eviction is necessary.
+* WT-2100 Rename evict to evict_queue so it's easier to search for.
+* WT-2101 Don't update the logging ckpt_lsn on clean shutdown.
+* WT-2102 Fix a hang in log slot join when forcing log writes.
+* WT-2105 Fix a bug where we could reference an invalid memory address if a file is corrupted on disk.
+* WT-2108 Rework in-memory page rewrite support (WT_PM_REC_REWRITE).
+* WT-2114 Make application eviction fairer.
+* WT-2115 Don't skip truncated pages that are part of a checkpoint.
+* WT-2116 Add diagnostic checks for stuck cache and dump the state.
+* WT-2119 Don't evict clean multiblock pages with overflow items during checkpoints.
+* WT-2126 Clean up if there is an error during splits.
+* WT-2127 Deepen the tree more regularly to avoid wide internal pages.
+* WT-2128 When decoding huffman encoding during salvage it's possible to have fewer bits than the
+          symbol length during decoding, if the value has been corrupted.
+* WT-2131 Switch to using a lock to control page splits to avoid starvation.
+* WT-2132 Make debug dump function more robust to errors.
+* WT-2134 Flush all buffered log records in log_flush.
+* WT-2135 Fix log_only setting for backup cursor. Fix initialization.
+* WT-2137 Check the sync_lsn is in the correct file before moving it forward.
+* WT-2139 Fix a transaction visibility bug in read-uncommitted transactions.
+* WT-2146 Improve performance when searching for short keys.
+* WT-2148 Fix a compiler warning in encoding functions.
+* WT-2153 Fix bug. Now we always need to start the log_server thread.
+* WT-2154 Make btree dump safer.
+* WT-2155 Remove last use of F_CAS_ATOMIC and the associated macro.
+* WT-2156 Allow eviction workers to restart.
+* WT-2157 Fix a bug where a failed page split could lead to incomplete checkpoints.
+* WT-2159 Don't check the config twice in one path.
+* WT-2162 Add null pointer check, needed after an index is dropped.
+* WT-2164 Prevent another LSM chunk checkpoint while the first is still in progress.
+* WT-2165 Stop using FALLOC_FL_KEEP_SIZE flag when pre-allocating files.
+* WT-2167 Switch recovery to using an internal session.
+* WT-2170 Protect the turtle file with a lock.
+* WT-2174 Avoid the table list lock when creating a size only statistics cursor.
+* WT-2178 In-memory storage engine support.
+* WT-2179 Added decorator to mark txn13 as part of the --long test suite.
+* WT-2180 Remove cursor.{search,search-near,remove} key size validation.
+* WT-2182 When internal pages grow large enough, split them into their parents.
+* WT-2184 Fix log scan bug when final record has many trailing zeros.
+* WT-2185 Don't do reverse splits when closing a file.
+* WT-2187 Add flag for flushing a slot.
+* WT-2189 Update flag set and clear macros to be less error prone.
+* WT-2191 In-memory disk image no longer the same as saved updates.
+* WT-2192 Fix the logic around checking whether internal page is evictable.
+* WT-2193 Handle read-committed metadata checkpoints during snapshot transactions.
+* WT-2194 Java close callbacks should handle cursors that Java code did not open.
+* WT-2195 Fix a hang after giving up on a reverse split.
+* WT-2196 Fix error handling in size only statistics.
+* WT-2199 Fix transaction sync inconsistency.
+* WT-2203 Release an allocated page on error.
+* WT-2204 Don't take a local copy of page->modify until we know the page is dirty.
+* WT-2206 Change cache operations from flags to an enumeration.
+* WT-2207 Track whenever a session has a handle exclusive.
+* WT-2210 Raw compression fails if row-store recovery precedes column-store recovery.
+* WT-2212 Add a "use_environment" config to ::wiredtiger_open.
+* WT-2218 Add truncate stats.
+* WT-2219 Enhancements to in-memory testing.
+* WT-2220 Update time comparison macros.
+* WT-2222 Add statistics for named snapshots.
+* WT-2224 Track which deleted refs are discarded by a split.
+* WT-2228 Avoid unnecessary raw-compression calls.
+* WT-2237 Have threads publish unique transaction IDs so that updates always become visible
+          immediately on commit.
+* WT-2241 Use a lock to protect transaction ID allocation.
+* WT-2243 Don't keep transaction IDs pinned for reading from checkpoints.
+* WT-2244 Trigger in-memory splits sooner.
+* WT-2248 WT_SESSION::close is updating WT_CONNECTION_IMPL.default_session.
+* WT-2249 Keep eviction stuck until cache usage is under 100%.
+* WT-2250 Minor fix.  Use SET instead of increment for stat.
+* WT-2251 Free addresses when we discard deleted page references.
+* WT-2253 Evict pages left behind by in-memory splits.
+* WT-2257 Fixes when given multiple thread workload configurations.
+* WT-2260 Avoid adding internal pages to the eviction queue
 
 WiredTiger release 2.6.1, 2015-05-13
 ------------------------------------
@@ -237,7 +392,7 @@ New features:
   refs WT-1908
 
 * Add the ability to flag a transaction to be flushed asynchronously on
-  commit via a new sync=[background] configuration option. Add a new 
+  commit via a new sync=[background] configuration option. Add a new
   WT_SESSION::transaction_sync API to wait for asynchronous flushes to
   complete.
   refs WT-1908, #1943
@@ -921,7 +1076,7 @@ New features and API changes:
 
 * Add new custom extractor functionality to WiredTiger indexes. Allowing an
   application to define mutated and/or multiple keys for indexes. [#1199]
- 
+
 * Add a new WT_SESSION::transaction_pinned_range method that allows users
   to identify when a session is keeping a transaction ID pinned for a long
   time. [#1314]
@@ -1418,7 +1573,7 @@ Significant changes include:
   [#756, #761]
 
 * WiredTiger statistics have been significantly improved:
-  
+
   Statistics logging has been changed to aggregate information from all
   open handles.  [#709, #717]
 
@@ -1765,7 +1920,7 @@ below:
 * Make run-time statistics optional, defaulted to "off".
 
 * Change how we detect if shared cache is used. It used to rely on a name,
-  now it will be used if the shared_cache configuration option is included. 
+  now it will be used if the shared_cache configuration option is included.
 
 * Add the ability to specify a per-connection reserved size for cache
   pools.  Ensure cache pool reconfiguration is honoured quickly.
@@ -1858,7 +2013,7 @@ changes are highlighted below:
 [392] Move examples/c/ex_test_perf.c to bench/wtperf.
 
 [322] Add support for statistics on schema-level objects i.e tables,
-      column groups, indices. 
+      column groups, indices.
 
 * Enhance statistics, including changing the name of some statistics.
 
@@ -2352,9 +2507,9 @@ upgrade.  Here is the full list of changes:
 [#262] Disable dump on child cursors: only the top-level cursor is wrapped
        in a dump cursor.
 
-[#266] Deal with new / dropped indices in __wt_schema_open_index. 
+[#266] Deal with new / dropped indices in __wt_schema_open_index.
 
-[#269] Checkpoint handles must not be open when they are overwritten. 
+[#269] Checkpoint handles must not be open when they are overwritten.
 
 [#271] Add support for a reserved checkpoint name "WiredTigerCheckpoint"
        that opens the object's last checkpoint.
@@ -2365,18 +2520,18 @@ upgrade.  Here is the full list of changes:
        cursor equality result in a separate argument.
 
 [#275] If exclusive handle is required for an operation and it is not
-       available, fail immediately: don't block. 
+       available, fail immediately: don't block.
 
 [#276] Fix methods that return integer parameters from Python.  This
-       includes cursor.equals and cursor.search_near. 
+       includes cursor.equals and cursor.search_near.
 
 [#277] Acquire the schema lock when creating the metadata file.  We're
        single-threaded, so it isn't protecting against anything, but the
-       handle management code expects to have the schema lock. 
+       handle management code expects to have the schema lock.
 
 [#279] Some optimizations for __wt_config_gets_defno.  Specifically, if
        we're dealing with a simple stack of config strings, just parse the
-       application string rather than the full list of defaults. 
+       application string rather than the full list of defaults.
 
 [#279] Split the description string into a set of structures, to reduce the
        number of string comparisons and manipulation that's required.
@@ -2403,19 +2558,19 @@ upgrade.  Here is the full list of changes:
 [#294] If txn_commit fails, document the transaction was rolled-back.
 
 [#295] Expand the documentation on using cursors without explicit
-       transactions. 
+       transactions.
 
 [#300] Include all changes whenever closing a file, don't check for
-       visibility.  If updates are skipped while evicting a page, give up. 
+       visibility.  If updates are skipped while evicting a page, give up.
 
 [#305] Have "wt dump" fail more gracefully if the object doesn't exist.
 
 [#310] When freeing a tracked address in reconciliation, clear it to avoid
-       freeing the same address again on error. 
+       freeing the same address again on error.
 
 [#314] Replace cursor.equals with cursor.compare
 
-[#319] Clear the bulk_load_ok flag when closing handles. 
+[#319] Clear the bulk_load_ok flag when closing handles.
 
 
 * Add an "ancient transaction" statistic so we can find out if they're
@@ -2610,7 +2765,7 @@ Fix the "exclusive" config for WT_SESSION::create. [#181]
 Fix an eviction bug introduced into 1.1.2: when evicting a page with children,
 remove the children from the LRU eviction queue.  Reduce the impact of clearing
 a page from the LRU queue by marking pages on the queue with a flag
-(WT_PAGE_EVICT_LRU).  
+(WT_PAGE_EVICT_LRU).
 
 During an eviction walk, pin pages up to the root so there is no need to spin
 when attempting to lock a parent page.  Use the EVICT_LRU page flag to avoid