grpc: enable client handling histogram
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type/enhancement
- Dominant language
- Go
- Stars
- 40.5k
- Forks
- 6.2k
- PR merge metrics
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Description
## Enhancement
Could we enable client handling histogram for grpc as [PD](https://github.com/tikv/pd/pull/590) did. This will make it very convenient for us to collect statistics through the GRPC layer, such as monitoring the incoming and outgoing traffic of GRPC.
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