Smityz opened a new pull request #604:
URL: https://github.com/apache/incubator-pegasus/pull/604
### What problem does this PR solve? <!--add issue link with summary if
exists-->
Add a policy for `hotspot_partition_calculator` to send RPC to start hotkey
detect in the replica_server auto.
### What is changed and how it works?
we can set `enable_hotkey_auto_detect = true` to start auto detect hotkey,
and set `hot_partition_threshold` and `occurrence_threshold` to adjust
sensitivity.
## Config changes
```diff
[pegasus.collector]
+ enable_hotkey_auto_detect
+ hot_partition_threshold
+ occurrence_threshold
```
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