# Errors
+ The health status of `TiKV` cluster:
  + **`Critical error:`** The number of critical errors
  + **`Server is busy:`** Indicates occurrences of events that make the `TiKV` instance unavailable temporarily, such as Write Stall, Channel Full, and so on. It should be 0 in normal case.
  + **`Raftstore error:`** The number of Raftstore errors per type on each `TiKV` instance
  + **`Scheduler error:`** The number of scheduler errors per type on each `TiKV` instance
  + **`Coprocessor error:`** The number of coprocessor errors per type on each `TiKV` instance
  + ...
![`smart`](ErrorsPanel_aa_001_20221028.png)

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