diff options
| -rw-r--r-- | src/mongo/db/storage/wiredtiger/wiredtiger_init.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/mongo/db/storage/wiredtiger/wiredtiger_init.cpp b/src/mongo/db/storage/wiredtiger/wiredtiger_init.cpp index f8dc319073c..f1176a2d024 100644 --- a/src/mongo/db/storage/wiredtiger/wiredtiger_init.cpp +++ b/src/mongo/db/storage/wiredtiger/wiredtiger_init.cpp @@ -52,6 +52,7 @@ #include "mongo/db/storage/wiredtiger/wiredtiger_server_status.h" #include "mongo/db/storage/wiredtiger/wiredtiger_util.h" #include "mongo/util/log.h" +#include "mongo/util/processinfo.h" namespace mongo { @@ -86,6 +87,19 @@ public: #endif size_t cacheMB = WiredTigerUtil::getCacheSizeMB(wiredTigerGlobalOptions.cacheSizeGB); + const double memoryThresholdPercentage = 0.8; + ProcessInfo p; + if (p.supported()) { + if (cacheMB > memoryThresholdPercentage * p.getMemSizeMB()) { + log() << startupWarningsLog; + log() << "** WARNING: The configured WiredTiger cache size is more than " + << memoryThresholdPercentage * 100 << "% of available RAM." + << startupWarningsLog; + log() << "** See " + "http://dochub.mongodb.org/core/faq-memory-diagnostics-wt" + << startupWarningsLog; + } + } const bool ephemeral = false; WiredTigerKVEngine* kv = new WiredTigerKVEngine(getCanonicalName().toString(), |