tidb-server frequent GC,make cpu usage high
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type/bug
- Dominant language
- Go
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Description
## Bug Report
Please answer these questions before submitting your issue. Thanks!
### 1. Minimal reproduce step (Required)
### 2. What did you expect to see? (Required)
cpu used as same as others tidb-server
### 3. What did you see instead (Required)
one instance cpu used higher than others, almost none left
### 4. What is your TiDB version? (Required)
6.5.5
abnomal image
prof/heap image
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