SERVER-43385 remove MMAPv1 references

22 files changed, 19 insertions, 118 deletions

diff --git a/buildscripts/gdb/mongo_lock.py b/buildscripts/gdb/mongo_lock.py
index 09996428a91..448d3518f46 100644
--- a/buildscripts/gdb/mongo_lock.py
+++ b/buildscripts/gdb/mongo_lock.py
@@ -309,10 +309,7 @@ def find_mutex_holder(graph, thread_dict, show):
 
 def find_lock_manager_holders(graph, thread_dict, show):  # pylint: disable=too-many-locals
     """Find lock manager holders."""
-    # In versions of MongoDB 4.0 and older, the LockerImpl class is templatized with a boolean
-    # parameter. With the removal of the MMAPv1 storage engine in MongoDB 4.2, the LockerImpl class
-    # is no longer templatized.
-    frame = find_frame(r'mongo::LockerImpl(?:\<.*\>)?::')
+    frame = find_frame(r'mongo::LockerImpl::')
     if not frame:
         return
 
@@ -321,15 +318,7 @@ def find_lock_manager_holders(graph, thread_dict, show):  # pylint: disable=too-
     (_, lock_waiter_lwpid, _) = gdb.selected_thread().ptid
     lock_waiter = thread_dict[lock_waiter_lwpid]
 
-    try:
-        locker_ptr_type = gdb.lookup_type("mongo::LockerImpl<false>").pointer()
-    except gdb.error as err:
-        # If we don't find the templatized version of the LockerImpl class, then we try to find the
-        # non-templatized version.
-        if not err.args[0].startswith("No type named"):
-            raise
-
-        locker_ptr_type = gdb.lookup_type("mongo::LockerImpl").pointer()
+    locker_ptr_type = gdb.lookup_type("mongo::LockerImpl").pointer()
 
     lock_head = gdb.parse_and_eval(
         "mongo::getGlobalLockManager()->_getBucket(resId)->findOrInsert(resId)")
diff --git a/buildscripts/packaging/msi/mongod.yaml b/buildscripts/packaging/msi/mongod.yaml
index ddfc798e4b4..ba10e7517ef 100644
--- a/buildscripts/packaging/msi/mongod.yaml
+++ b/buildscripts/packaging/msi/mongod.yaml
@@ -9,7 +9,6 @@ storage:
   journal:
     enabled: true
 #  engine:
-#  mmapv1:
 #  wiredTiger:
 
 # where to write logging data.
diff --git a/buildscripts/tests/ciconfig/evergreen.yml b/buildscripts/tests/ciconfig/evergreen.yml
index eeca00586b2..cb20efc55ec 100644
--- a/buildscripts/tests/ciconfig/evergreen.yml
+++ b/buildscripts/tests/ciconfig/evergreen.yml
@@ -138,7 +138,7 @@ tasks:
     - func: "setup"
     - func: "run tests"
       vars:
-        resmoke_args: "--suites=somesuite --storageEngine=mmapv1"
+        resmoke_args: "--suites=somesuite --storageEngine=wiredTiger"
 
 
 modules:
diff --git a/buildscripts/tests/ciconfig/test_evergreen.py b/buildscripts/tests/ciconfig/test_evergreen.py
index 2132e5ecf91..e1734016023 100644
--- a/buildscripts/tests/ciconfig/test_evergreen.py
+++ b/buildscripts/tests/ciconfig/test_evergreen.py
@@ -458,7 +458,7 @@ class TestVariant(unittest.TestCase):
 
         # Check combined_resmoke_args when test_flags is set on the variant.
         resmoke_task = variant_ubuntu.get_task("resmoke_task")
-        self.assertEqual("--suites=somesuite --storageEngine=mmapv1 --param=value --ubuntu",
+        self.assertEqual("--suites=somesuite --storageEngine=wiredTiger --param=value --ubuntu",
                          resmoke_task.combined_resmoke_args)
 
         # Check combined_resmoke_args when the task doesn't have resmoke_args.
@@ -468,7 +468,7 @@ class TestVariant(unittest.TestCase):
         # Check combined_resmoke_args when test_flags is not set on the variant.
         variant_debian = self.conf.get_variant("debian")
         resmoke_task = variant_debian.get_task("resmoke_task")
-        self.assertEqual("--suites=somesuite --storageEngine=mmapv1",
+        self.assertEqual("--suites=somesuite --storageEngine=wiredTiger",
                          resmoke_task.combined_resmoke_args)
 
         # Check for tasks included in task_groups
diff --git a/debian/mongod.conf b/debian/mongod.conf
index 4a82d14d95a..695b62ca9b5 100644
--- a/debian/mongod.conf
+++ b/debian/mongod.conf
@@ -9,7 +9,6 @@ storage:
   journal:
     enabled: true
 #  engine:
-#  mmapv1:
 #  wiredTiger:
 
 # where to write logging data.
diff --git a/jstests/concurrency/fsm_workloads/findAndModify_update_grow.js b/jstests/concurrency/fsm_workloads/findAndModify_update_grow.js
index 19ba3f27ab9..0eebb29cb59 100644
--- a/jstests/concurrency/fsm_workloads/findAndModify_update_grow.js
+++ b/jstests/concurrency/fsm_workloads/findAndModify_update_grow.js
@@ -4,11 +4,9 @@
  * findAndModify_update_grow.js
  *
  * Each thread inserts a single document into a collection, and then
- * repeatedly performs the findAndModify command. Attempts to trigger
- * the same conditions that with MMAPv1 caused a document move,
- * by growing the size of the inserted document using the $set and $mul
- * update operators. Now checks that document moves don't happen and
- * that large changes in document size are handled correctly.
+ * repeatedly performs the findAndModify command. Checks that document
+ * moves don't happen and that large changes in document size are handled
+ * correctly.
  */
 load('jstests/concurrency/fsm_workload_helpers/server_types.js');  // for isMongod
 
diff --git a/jstests/noPassthrough/command_line_parsing.js b/jstests/noPassthrough/command_line_parsing.js
index 511aabf90dd..95ecdb6cb85 100644
--- a/jstests/noPassthrough/command_line_parsing.js
+++ b/jstests/noPassthrough/command_line_parsing.js
@@ -28,7 +28,6 @@ MongoRunner.stopMongod(m2);
 
 // remove variables that depend on the way the test is started.
 delete m2result.parsed.net.transportLayer;
-delete m2result.parsed.storage.mmapv1;
 delete m2result.parsed.setParameter;
 delete m2result.parsed.storage.engine;
 delete m2result.parsed.storage.inMemory;
@@ -56,7 +55,6 @@ MongoRunner.stopMongod(m3);
 
 // remove variables that depend on the way the test is started.
 delete m3result.parsed.net.transportLayer;
-delete m3result.parsed.storage.mmapv1;
 delete m3result.parsed.setParameter;
 delete m3result.parsed.storage.engine;
 delete m3result.parsed.storage.inMemory;
diff --git a/jstests/noPassthrough/hyphenated_database_name.js b/jstests/noPassthrough/hyphenated_database_name.js
index 0290e4444d9..d6060655118 100644
--- a/jstests/noPassthrough/hyphenated_database_name.js
+++ b/jstests/noPassthrough/hyphenated_database_name.js
@@ -5,8 +5,8 @@
  */
 (function() {
 "use strict";
-var isDirectoryPerDBSupported = jsTest.options().storageEngine == "wiredTiger" ||
-    jsTest.options().storageEngine == "mmapv1" || !jsTest.options().storageEngine;
+var isDirectoryPerDBSupported =
+    jsTest.options().storageEngine == "wiredTiger" || !jsTest.options().storageEngine;
 if (!isDirectoryPerDBSupported)
     return;
 
diff --git a/jstests/replsets/drop_collections_two_phase_rename_drop_target.js b/jstests/replsets/drop_collections_two_phase_rename_drop_target.js
index 4e35c394b21..5191fb47127 100644
--- a/jstests/replsets/drop_collections_two_phase_rename_drop_target.js
+++ b/jstests/replsets/drop_collections_two_phase_rename_drop_target.js
@@ -42,8 +42,7 @@ twoPhaseDropTest.createCollection(fromCollName);
 twoPhaseDropTest.createCollection(toCollName);
 
 // Collection renames with dropTarget set to true should handle long index names in the target
-// collection gracefully. MMAPv1 imposes a hard limit on index namespaces so we have to drop
-// indexes that are too long to store on disk after renaming the collection.
+// collection gracefully.
 const primary = replTest.getPrimary();
 const testDb = primary.getDB(dbName);
 const fromColl = testDb.getCollection(fromCollName);
diff --git a/pytests/powertest.py b/pytests/powertest.py
index 6c2904132ef..eeef8472fa5 100755
--- a/pytests/powertest.py
+++ b/pytests/powertest.py
@@ -1778,7 +1778,7 @@ Examples:
             --crashOption output1
             --sshCrashUserHost admin@10.4.100.2
             --sshCrashOption "-oKexAlgorithms=+diffie-hellman-group1-sha1 -i /Users/jonathan/.ssh/mFi.pem"
-            --mongodOptions "--storageEngine mmapv1"
+            --mongodOptions "--storageEngine wiredTiger"
 
     Linux server running in AWS, testing nojournal:
       python powertest.py
@@ -1978,9 +1978,7 @@ Examples:
     mongod_options.add_option(
         "--removeLockFile", dest="remove_lock_file",
         help="If specified, the mongod.lock file will be deleted after a"
-        " powercycle event, before mongod is started. This is a"
-        " workaround for mongod failing start with MMAPV1 (See"
-        " SERVER-15109).", action="store_true", default=False)
+        " powercycle event, before mongod is started.", action="store_true", default=False)
 
     # Client options
     mongo_path = distutils.spawn.find_executable("dist-test/bin/mongo",
diff --git a/src/mongo/db/catalog/create_collection.cpp b/src/mongo/db/catalog/create_collection.cpp
index 2fef0686a47..1c74a34159f 100644
--- a/src/mongo/db/catalog/create_collection.cpp
+++ b/src/mongo/db/catalog/create_collection.cpp
@@ -251,7 +251,7 @@ Status createCollectionForApplyOps(OperationContext* opCtx,
     // collection already exists under a different name. If so, rename it into place. As this is
     // done during replay of the oplog, the operations do not need to be atomic, just idempotent.
     // We need to do the renaming part in a separate transaction, as we cannot transactionally
-    // create a database on MMAPv1, which could result in createCollection failing if the database
+    // create a database, which could result in createCollection failing if the database
     // does not yet exist.
     if (ui) {
         // Return an optional, indicating whether we need to early return (if the collection already
@@ -291,11 +291,7 @@ Status createCollectionForApplyOps(OperationContext* opCtx,
                 // In the case of oplog replay, a future command may have created or renamed a
                 // collection with that same name. In that case, renaming this future collection to
                 // a random temporary name is correct: once all entries are replayed no temporary
-                // names will remain.  On MMAPv1 the rename can result in index names that are too
-                // long. However this should only happen for initial sync and "resync collection"
-                // for rollback, so we can let the error propagate resulting in an abort and restart
-                // of the initial sync or result in rollback to fassert, requiring a resync of that
-                // node.
+                // names will remain.
                 const bool stayTemp = true;
                 auto futureColl = db
                     ? CollectionCatalog::get(opCtx).lookupCollectionByNamespace(opCtx, newCollName)
diff --git a/src/mongo/db/catalog/rename_collection.cpp b/src/mongo/db/catalog/rename_collection.cpp
index 08383c041bc..9272fd2e3ff 100644
--- a/src/mongo/db/catalog/rename_collection.cpp
+++ b/src/mongo/db/catalog/rename_collection.cpp
@@ -229,9 +229,6 @@ Status renameCollectionAndDropTarget(OperationContext* opCtx,
         // Target collection exists - drop it.
         invariant(options.dropTarget);
 
-        // If this rename collection is replicated, check for long index names in the target
-        // collection that may exceed the MMAPv1 namespace limit when the target collection
-        // is renamed with a drop-pending namespace.
         auto replCoord = repl::ReplicationCoordinator::get(opCtx);
         auto isOplogDisabledForNamespace = replCoord->isOplogDisabledFor(opCtx, target);
         if (!isOplogDisabledForNamespace) {
diff --git a/src/mongo/db/s/session_catalog_migration_destination.cpp b/src/mongo/db/s/session_catalog_migration_destination.cpp
index 1c9199b727f..8e9f5c4a89f 100644
--- a/src/mongo/db/s/session_catalog_migration_destination.cpp
+++ b/src/mongo/db/s/session_catalog_migration_destination.cpp
@@ -264,10 +264,9 @@ ProcessOplogResult processSessionOplog(const BSONObj& oplogBSON,
         NamespaceString::kSessionTransactionsTableNamespace.ns(),
         [&] {
             // Need to take global lock here so repl::logOp will not unlock it and trigger the
-            // invariant that disallows unlocking global lock while inside a WUOW. Grab a DBLock
-            // here instead of plain GlobalLock to make sure the MMAPV1 flush lock will be
-            // lock/unlocked correctly. Take the transaction table db lock to ensure the same lock
-            // ordering with normal replicated updates to the table.
+            // invariant that disallows unlocking global lock while inside a WUOW. Take the
+            // transaction table db lock to ensure the same lock ordering with normal replicated
+            // updates to the table.
             Lock::DBLock lk(
                 opCtx, NamespaceString::kSessionTransactionsTableNamespace.db(), MODE_IX);
             WriteUnitOfWork wunit(opCtx);
diff --git a/src/mongo/db/server_recovery.h b/src/mongo/db/server_recovery.h
index 3b9d87a8065..52f9858ce4d 100644
--- a/src/mongo/db/server_recovery.h
+++ b/src/mongo/db/server_recovery.h
@@ -37,8 +37,7 @@
 
 namespace mongo {
 /**
- * This class is for use with non-MMAPv1 storage engines that track record store sizes in catalog
- * metadata.
+ * This class is for use with storage engines that track record store sizes in catalog metadata.
  *
  * During normal server operation, we adjust the size metadata for all record stores. But when
  * performing replication recovery, we avoid doing so, as we trust that the size metadata on disk is
diff --git a/src/mongo/util/processinfo.h b/src/mongo/util/processinfo.h
index a65285ef134..732649d60b8 100644
--- a/src/mongo/util/processinfo.h
+++ b/src/mongo/util/processinfo.h
@@ -160,13 +160,6 @@ public:
     static bool blockInMemory(const void* start);
 
     /**
-     * Returns a positive floating point number between 0.0 and 1.0 to inform MMapV1 how much it
-     * must remap pages to bring the system page file implementation back below a certain
-     * threshold. A number of 1.0 means remap everything.
-     */
-    static double getSystemMemoryPressurePercentage();
-
-    /**
      * @return a pointer aligned to the start of the page the provided pointer belongs to.
      *
      * NOTE requires blockCheckSupported() == true
diff --git a/src/mongo/util/processinfo_freebsd.cpp b/src/mongo/util/processinfo_freebsd.cpp
index d7f1d4127ca..f47e13e2b92 100644
--- a/src/mongo/util/processinfo_freebsd.cpp
+++ b/src/mongo/util/processinfo_freebsd.cpp
@@ -120,10 +120,6 @@ int ProcessInfo::getResidentSize() {
     return rss;
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    return 0.0;
-}
-
 void ProcessInfo::SystemInfo::collectSystemInfo() {
     osType = "BSD";
     osName = "FreeBSD";
diff --git a/src/mongo/util/processinfo_linux.cpp b/src/mongo/util/processinfo_linux.cpp
index 78c38ec996f..639f0f57e82 100644
--- a/src/mongo/util/processinfo_linux.cpp
+++ b/src/mongo/util/processinfo_linux.cpp
@@ -538,10 +538,6 @@ int ProcessInfo::getResidentSize() {
     return (int)((p.getResidentSizeInPages() * getPageSize()) / (1024.0 * 1024));
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    return 0.0;
-}
-
 void ProcessInfo::getExtraInfo(BSONObjBuilder& info) {
     struct rusage ru;
     getrusage(RUSAGE_SELF, &ru);
diff --git a/src/mongo/util/processinfo_openbsd.cpp b/src/mongo/util/processinfo_openbsd.cpp
index 5736504ce9c..260acc84a20 100644
--- a/src/mongo/util/processinfo_openbsd.cpp
+++ b/src/mongo/util/processinfo_openbsd.cpp
@@ -130,10 +130,6 @@ int ProcessInfo::getResidentSize() {
     return rss;
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    return 0.0;
-}
-
 void ProcessInfo::SystemInfo::collectSystemInfo() {
     osType = "BSD";
     osName = "OpenBSD";
diff --git a/src/mongo/util/processinfo_osx.cpp b/src/mongo/util/processinfo_osx.cpp
index aab2f4e3fd7..4de98f203ca 100644
--- a/src/mongo/util/processinfo_osx.cpp
+++ b/src/mongo/util/processinfo_osx.cpp
@@ -116,10 +116,6 @@ int ProcessInfo::getResidentSize() {
     return (int)(ti.resident_size / (1024 * 1024));
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    return 0.0;
-}
-
 void ProcessInfo::getExtraInfo(BSONObjBuilder& info) {
     struct task_events_info taskInfo;
     mach_msg_type_number_t taskInfoCount = TASK_EVENTS_INFO_COUNT;
diff --git a/src/mongo/util/processinfo_solaris.cpp b/src/mongo/util/processinfo_solaris.cpp
index 54ae6184fe2..61e509a1089 100644
--- a/src/mongo/util/processinfo_solaris.cpp
+++ b/src/mongo/util/processinfo_solaris.cpp
@@ -124,10 +124,6 @@ int ProcessInfo::getResidentSize() {
     return static_cast<int>(p.psinfo.pr_rssize / 1024);
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    return 0.0;
-}
-
 void ProcessInfo::getExtraInfo(BSONObjBuilder& info) {
     ProcUsage p;
     info.appendNumber("page_faults", static_cast<long long>(p.prusage.pr_majf));
diff --git a/src/mongo/util/processinfo_unknown.cpp b/src/mongo/util/processinfo_unknown.cpp
index 05f84b7f22c..b77e79d8fae 100644
--- a/src/mongo/util/processinfo_unknown.cpp
+++ b/src/mongo/util/processinfo_unknown.cpp
@@ -51,10 +51,6 @@ int ProcessInfo::getResidentSize() {
     return -1;
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    return 0.0;
-}
-
 bool ProcessInfo::checkNumaEnabled() {
     return false;
 }
diff --git a/src/mongo/util/processinfo_windows.cpp b/src/mongo/util/processinfo_windows.cpp
index 31c0908fb32..b8a976fabcd 100644
--- a/src/mongo/util/processinfo_windows.cpp
+++ b/src/mongo/util/processinfo_windows.cpp
@@ -97,45 +97,6 @@ int ProcessInfo::getResidentSize() {
     return _wconvertmtos(pmc.WorkingSetSize);
 }
 
-double ProcessInfo::getSystemMemoryPressurePercentage() {
-    MEMORYSTATUSEX mse;
-    mse.dwLength = sizeof(mse);
-    BOOL status = GlobalMemoryStatusEx(&mse);
-    if (!status) {
-        DWORD gle = GetLastError();
-        LOGV2_ERROR(23814,
-                    "GlobalMemoryStatusEx failed with {errnoWithDescription_gle}",
-                    "errnoWithDescription_gle"_attr = errnoWithDescription(gle));
-        fassert(28623, status);
-    }
-
-    DWORDLONG totalPageFile = mse.ullTotalPageFile;
-    if (totalPageFile == 0) {
-        return false;
-    }
-
-    // If the page file is >= 50%, say we are low on system memory
-    // If the page file is >= 75%, we are running very low on system memory
-    //
-    DWORDLONG highWatermark = totalPageFile / 2;
-    DWORDLONG veryHighWatermark = 3 * (totalPageFile / 4);
-
-    DWORDLONG usedPageFile = mse.ullTotalPageFile - mse.ullAvailPageFile;
-
-    // Below the watermark, we are fine
-    // Also check we will not do a divide by zero below
-    if (usedPageFile < highWatermark || veryHighWatermark <= highWatermark) {
-        return 0.0;
-    }
-
-    // Above the high watermark, we tell MMapV1 how much to remap
-    // < 1.0, we have some pressure, but not much so do not be very aggressive
-    // 1.0 = we are at very high watermark, remap everything
-    // > 1.0, the user may run out of memory, remap everything
-    // i.e., Example (N - 50) / (75 - 50)
-    return static_cast<double>(usedPageFile - highWatermark) / (veryHighWatermark - highWatermark);
-}
-
 void ProcessInfo::getExtraInfo(BSONObjBuilder& info) {
     MEMORYSTATUSEX mse;
     mse.dwLength = sizeof(mse);