update

hawkingrei · hawkingrei · commit 45f2f2fec54d · 2023-08-14T14:43:34.000+08:00
Signed-off-by: Weizhen Wang &lt;wangweizhen@pingcap.com&gt;
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

Original file line number	Diff line number	Diff line change
`@@ -45,7 +45,8 @@ type topnStatsMergeWorker struct {`
`45`	`45`	`respCh chan<- *TopnStatsMergeResponse`
`46`	`46`	`// the stats in the wrapper should only be read during the worker`
`47`	`47`	`statsWrapper *StatsWrapper`
`48`		`- shardMutex []sync.Mutex`
	`48`	+ // shardMutex is used to protect `statsWrapper.AllHg`
	`49`	`+ shardMutex []sync.Mutex`
`49`	`50`	`}`
`50`	`51`
`51`	`52`	`// NewTopnStatsMergeWorker returns topn merge worker`