on a collection drop remove namespaces from Top SERVER-768

2 files changed, 7 insertions, 1 deletions

diff --git a/db/stats/top.cpp b/db/stats/top.cpp
index 7f42d79b957..0c1bd1900af 100644
--- a/db/stats/top.cpp
+++ b/db/stats/top.cpp
@@ -52,6 +52,11 @@ namespace mongo {
         _record( coll , op , lockType , micros , command );
         _record( _global , op , lockType , micros , command );
     }
+
+    void Top::collectionDropped( const string& ns ){
+        scoped_lock lk(_lock);
+        _usage.erase(ns);
+    }
     
     void Top::_record( CollectionData& c , int op , int lockType , long long micros , bool command ){
         c.total.inc( micros );
diff --git a/db/stats/top.h b/db/stats/top.h
index 9860733f5f8..1f977061666 100644
--- a/db/stats/top.h
+++ b/db/stats/top.h
@@ -70,7 +70,8 @@ namespace mongo {
         void append( BSONObjBuilder& b );
         void cloneMap(UsageMap& out);
         CollectionData getGlobalData(){ return _global; }
-        
+        void collectionDropped( const string& ns );
+
     public: // static stuff
         static Top global;