diff --git a/tests/benchmark/milvus_benchmark/update.py b/tests/benchmark/milvus_benchmark/update.py
index a4ab7cf35d..f32162717f 100644
--- a/tests/benchmark/milvus_benchmark/update.py
+++ b/tests/benchmark/milvus_benchmark/update.py
@@ -9,6 +9,7 @@ import utils
 
 
 def parse_server_tag(server_tag):
+    """ paser server tag from server config"""
     # tag format: "8c"/"8c16m"/"8c16m1g"
     if server_tag[-1] == "c":
         p = r"(\d+)c"