update

Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
pingcap · Aug 14, 2023 · 45f2f2f · 45f2f2f
1 parent 3f8bcc9
commit 45f2f2f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/statistics/merge_worker.go b/statistics/merge_worker.go
@@ -45,7 +45,8 @@ type topnStatsMergeWorker struct {
 	respCh chan<- *TopnStatsMergeResponse
 	// the stats in the wrapper should only be read during the worker
 	statsWrapper *StatsWrapper
-	shardMutex   []sync.Mutex
+	// shardMutex is used to protect `statsWrapper.AllHg`
+	shardMutex []sync.Mutex
 }
 
 // NewTopnStatsMergeWorker returns topn merge worker