diff --git a/server/server.yaml b/server/server.yaml
index 8b6d7198f5b..9d42a2392c2 100644
--- a/server/server.yaml
+++ b/server/server.yaml
@@ -509,7 +509,7 @@ ingester:
   #  vtap-app-1m: 168      # vtap_app[_edge]_port.1m
   #  vtap-app-1s: 24      # vtap_app[_edge]_port.1s
 
-  ## flow_metrics database data retention time(unit: hour)
+  ## flow_log database data retention time(unit: hour)
   ## Note: This configuration is only valid when DeepFlow is run for the first time or the ClickHouse tables have not yet been created
   #flow-log-ttl-hour:
   #  l4-flow-log: 72