priyen-stripe opened a new pull request, #17198:
URL: https://github.com/apache/pinot/pull/17198
Currently, when you use the multi stage engine thread limiting feature, (via
configs such as below)
```
pinot.server.query.executor.mse.max.execution.threads=1000
pinot.server.query.executor.mse.max.execution.threads.exceed.strategy=ERROR
```
you have no insights, through metrics, what's the current usage or how close
you are to the limits. So without this, we are also unable to catch issues
inadvance of when users might see them
This PR adds two gauges:
MSE_THREAD_USAGE_MAX("threads", true, "Maximum allowed threads for
multi-stage executor"),
MSE_THREAD_USAGE_CURRENT("threads", true, "Current number of threads in
use by multi-stage executor");
Also updates the test using similiar code to existing tests
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