diff options
Diffstat (limited to 'db')
| -rw-r--r-- | db/dur.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/db/dur.cpp b/db/dur.cpp index 3e2c3ecea56..b39dea0b5af 100644 --- a/db/dur.cpp +++ b/db/dur.cpp @@ -434,7 +434,17 @@ namespace mongo { fraction = 1; lastRemap = now; +#if defined(_WIN32) + // Note that this negatively affects performance. + // We must grab the exclusive lock here because remapThePrivateView() on Windows needs + // to grab it as well, due to the lack of a non-atomic way to remap a memory mapped file. + // See SERVER-5723 for performance improvement. + // See SERVER-5680 to see why this code is necessary. + RWLockRecursive::Exclusive lk(MongoFile::mmmutex); +#else RWLockRecursive::Shared lk(MongoFile::mmmutex); +#endif + set<MongoFile*>& files = MongoFile::getAllFiles(); unsigned sz = files.size(); if( sz == 0 ) |