## What Happening

某个 TiKV 的空间占用超过 90%

## Related Issues or Alerts
> Parse issue or alert link 

## Diagnosis
> How to investigate the problem

## Solution

* 确认是否需要扩容
* 排查是否有文件占用了大量磁盘空间，比如日志、快照或 core dump等文件

## Post-Check
> Check issue fixes