[skip ci] Update codes of benchmark (#10897)

Signed-off-by: wangting0128 <ting.wang@zilliz.com>

tests/benchmark/milvus_benchmark/metrics/api.py

@@ -28,7 +28,6 @@ def save(obj):
         logger.error("obj is not instance of Metric")
         return False
 
-    logger.debug(vars(obj))
     if not isinstance(obj.server, Server):
         logger.error("obj.server is not instance of Server")
         return False
@@ -54,5 +53,6 @@ def save(obj):
     obj.env = {"id": env_doc_id, "value": vars(obj.env)}
 
     # insert data to mongoDB
+    logger.debug(vars(obj))
     collection = _client[DB][DOC_COLLECTION]
     collection.insert_one(vars(obj))