diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index ad50cbd3ca..c69a1b60f6 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -213,7 +213,7 @@ log:
   file:
     rootPath: "" # default to stdout, stderr
     maxSize: 300 # MB
-    maxAge: 10 # day
+    maxAge: 10 # Maximum time for log retention in day.
     maxBackups: 20
   format: text # text/json