diff --git a/internal/db/models/metric_stat_dao.go b/internal/db/models/metric_stat_dao.go
index b5d299a9..1cf23a22 100644
--- a/internal/db/models/metric_stat_dao.go
+++ b/internal/db/models/metric_stat_dao.go
@@ -481,6 +481,7 @@ func (this *MetricStatDAO) Clean(tx *dbs.Tx) error {
 				_, err := this.Query(tx).
 					Attr("itemId", item.Id).
 					Lte("createdDay", expiresDay).
+					UseIndex("createdDay").
 					Limit(100_000). // 一次性不要删除太多，防止阻塞其他操作
 					Delete()
 				if err != nil {
diff --git a/internal/db/models/metric_sum_stat_dao.go b/internal/db/models/metric_sum_stat_dao.go
index 5526b737..61ca76d5 100644
--- a/internal/db/models/metric_sum_stat_dao.go
+++ b/internal/db/models/metric_sum_stat_dao.go
@@ -188,6 +188,7 @@ func (this *MetricSumStatDAO) Clean(tx *dbs.Tx) error {
 					Attr("itemId", item.Id).
 					Where("(createdDay IS NULL OR createdDay<:day)").
 					Param("day", expiresDay).
+					UseIndex("createdDay").
 					Limit(100_000). // 一次性不要删除太多，防止阻塞其他操作
 					Delete()
 				if err != nil {