diff --git a/internal/querynode/impl.go b/internal/querynode/impl.go
index 0fd0ea550c..43e09d20df 100644
--- a/internal/querynode/impl.go
+++ b/internal/querynode/impl.go
@@ -424,6 +424,7 @@ func (node *QueryNode) ReleasePartitions(ctx context.Context, in *queryPb.Releas
 	return status, nil
 }
 
+// ReleaseSegments remove the specified segments from query node according segmentIDs, partitionIDs, and collectionID
 func (node *QueryNode) ReleaseSegments(ctx context.Context, in *queryPb.ReleaseSegmentsRequest) (*commonpb.Status, error) {
 	code := node.stateCode.Load().(internalpb.StateCode)
 	if code != internalpb.StateCode_Healthy {