# Monitoring Analysis (A)

+ Grafana monitoring`TiKV Details --> Thread CPU (gRPC pool/Scheduler worker/Raft store/Async apply)`
  + The usage rate of the above metric is below 40%, and the bottleneck has not been reached


![left](./student-guide/diagram/03-20-1.png)

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Grafana Monitoring TiKV Details —> Thread CPU is a large panel set that contains gRPC pool, Scheduler worker, Raft store, Async apply, etc. You can use Thread CPU to view the usage of each thread pool In the figure, gRPC pool, scheduler worker, Raft store, and async apply are stable at the time the problem occurs, and all CPU usage is basically below 40%, so the possibility of performance jitter caused by the thread pool is excluded.

The bottleneck of the CPU is generally 60% ~ 80%