PoolExecutor metrics

[dacevedo12]

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What problem do you want to solve?

In python, both sync and async worlds, there are ThreadPoolExecutors and ProcessPoolExecutors.

These executors have a max_workers parameter that constraints them. If an app hits that amount of workers, exhaustion happen which manifests as degraded performance.

Describe the solution you'd like

Having metrics of that can be useful for app developers to identify bottlenecks and determine better capacity

Implementation can be inspired by https://stackoverflow.com/questions/48572648/how-to-monitor-pythons-concurrent-futures-processpoolexecutor

Describe alternatives you've considered

Instrumenting those metrics in my app code

Additional Context

No response

Would you like to implement a fix?

None