diff --git a/tests/pytest/tools/schemalessInsertPerformance.py b/tests/pytest/tools/schemalessInsertPerformance.py
index 0dcbc5ffe20104555730fc8fc68cc378f85339e4..68802310a265e062ef01f4ec5303b722c0045198 100644
--- a/tests/pytest/tools/schemalessInsertPerformance.py
+++ b/tests/pytest/tools/schemalessInsertPerformance.py
@@ -190,7 +190,10 @@ class TDTestCase:
 
     def batchInsertTable(self, batch_list):
         for insert_list in batch_list:
+            print(threading.current_thread().name, "length=", len(insert_list))
+            print(threading.current_thread().name, 'firstline', insert_list[0], 'lastline:', insert_list[-1])
             self._conn.insert_lines(insert_list)
+            print(threading.current_thread().name, 'end')
 
     def genTableThread(self, thread_count=10):
         threads = list()
@@ -228,7 +231,6 @@ class TDTestCase:
         self.createStb()
         table_list, end_list = self.splitTableList()
         batchInsertTableThread = self.threadInsertTable(end_list=end_list)
-        print(end_list)
         self.multiThreadRun(batchInsertTableThread)
         # print(end_list)