diff --git a/src/observer/mysql/ob_query_driver.cpp b/src/observer/mysql/ob_query_driver.cpp
index 97f846b782..1ab2216834 100644
--- a/src/observer/mysql/ob_query_driver.cpp
+++ b/src/observer/mysql/ob_query_driver.cpp
@@ -196,6 +196,12 @@ int ObQueryDriver::response_query_result(ObResultSet &result,
             K(can_retry));
         // break;
       } else {
+        ObArenaAllocator *allocator = NULL;
+        if (OB_FAIL(result.get_exec_context().get_convert_charset_allocator(allocator))) {
+          LOG_WARN("fail to get lob fake allocator", K(ret));
+        } else if (OB_NOT_NULL(allocator)) {
+          allocator->reset_remain_one_page();
+        }
         LOG_DEBUG("response row succ", K(*row));
       }
       if (OB_SUCC(ret)) {