# 案例 A：TSO 生成慢-故障现象

+ 查询慢查询日志发现：
  + 获取事务 start_ts 的耗时较长
+ 查询 TiDB 日志发现：
```
[2021/06/03 11:34:21.809 +08:00] [WARN] [pd.go:131] ["get timestamp too slow"] [conn=5544643] ["cost time"=104.15131ms]
```
------------------------------------------------------------
[2021/06/03 11:34:21.809 +08:00] [WARN] [pd.go:131] ["get timestamp too slow"] [conn=5544643] ["cost time"=104.15131ms]