# Leader drop 现象(B)

+ TiDB Dashboard -> Query Summary -> Duration
+ TiKV-Details --> Errors
![center](./student-guide/diagram/place-holder.png)

![center](./student-guide/diagram/place-holder.png)

![center](./student-guide/diagram/place-holder.png)

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TiDB Dashboard -> Query Summary -> Duration 升高
- TiKV-Details --> Errors 面板会看到大量的报错