diff --git a/src/storage/ddl/ob_ddl_redo_log_writer.cpp b/src/storage/ddl/ob_ddl_redo_log_writer.cpp
index e21b9f821a..d89635304a 100644
--- a/src/storage/ddl/ob_ddl_redo_log_writer.cpp
+++ b/src/storage/ddl/ob_ddl_redo_log_writer.cpp
@@ -108,8 +108,8 @@ int ObDDLCtrlSpeedItem::refresh()
   } else {
     // archive is not on if ignore = true.
     write_speed_ = ignore ? std::max(refresh_speed, 1 * MIN_WRITE_SPEED) : std::max(archive_speed, 1 * MIN_WRITE_SPEED);
-    disk_used_stop_write_threshold_ = (palf_opt.disk_options_.log_disk_utilization_threshold_ +
-                                       palf_opt.disk_options_.log_disk_utilization_limit_threshold_) / 2;
+    disk_used_stop_write_threshold_ = min(palf_opt.disk_options_.log_disk_utilization_threshold_,
+                                       palf_opt.disk_options_.log_disk_utilization_limit_threshold_);
     need_stop_write_ = 100.0 * total_used_space / total_disk_space >= disk_used_stop_write_threshold_ ? true : false;
   }
   LOG_DEBUG("current ddl clog write speed", K(ret), K(need_stop_write_), K(ls_id_), K(archive_speed), K(write_speed_),