From 055b516ad1ee4d3c96c7702bcd166988c4eeffd7 Mon Sep 17 00:00:00 2001
From: cooper-lzy <78672629+cooper-lzy@users.noreply.github.com>
Date: Thu, 23 Sep 2021 17:36:02 +0800
Subject: [PATCH] Update ex-ug-import-from-sst.md (#996)

---
 .../nebula-exchange/use-exchange/ex-ug-import-from-sst.md     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs-2.0/nebula-exchange/use-exchange/ex-ug-import-from-sst.md b/docs-2.0/nebula-exchange/use-exchange/ex-ug-import-from-sst.md
index 9a3bd6a720..99bfebf260 100644
--- a/docs-2.0/nebula-exchange/use-exchange/ex-ug-import-from-sst.md
+++ b/docs-2.0/nebula-exchange/use-exchange/ex-ug-import-from-sst.md
@@ -468,6 +468,10 @@ ${SPARK_HOME}/bin/spark-submit  --master "local" --class com.vesoft.nebula.excha
 
     - Graph服务配置文件中的`--ws_meta_http_port`（如果没有，请手动添加）和Meta服务配置文件中的`--ws_http_port`一致。例如都为`19559`。
 
+!!! caution
+  
+    如果需要导入SST文件至Nebula Graph 2.5.x中，请在[Storage配置文件](../../5.configurations-and-logs/1.configurations/4.storage-config.md)中添加`--enable_vertex_cache =false`，并重启Storage服务，才能正常导入SST文件，否则可能会出现没有覆盖旧数据的问题。
+
 使用客户端工具连接Nebula Graph数据库，按如下操作导入SST文件：
 
 1. 执行命令选择之前创建的图空间。