add logging for when file allocation from ExtentManager takes more than 1 second

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mongo/db/storage/extent_manager.cpp b/src/mongo/db/storage/extent_manager.cpp
index 013c938cd81..89a8829d98b 100644
--- a/src/mongo/db/storage/extent_manager.cpp
+++ b/src/mongo/db/storage/extent_manager.cpp
@@ -152,7 +152,12 @@ namespace mongo {
             if ( sizeNeeded + DataFileHeader::HeaderSize > minSize )
                 minSize = sizeNeeded + DataFileHeader::HeaderSize;
             try {
+                Timer t;
                 p->open( fullNameString.c_str(), minSize, preallocateOnly );
+                if ( t.seconds() > 1 ) {
+                    log() << "ExtentManager took " << t.seconds()
+                          << " seconds to open: " << fullNameString;
+                }
             }
             catch ( AssertionException& ) {
                 delete p;