WingsGo opened a new issue #4085:
URL: https://github.com/apache/incubator-doris/issues/4085
Currently, FE's Thread is managed by `ThreadPoolManager`, but BE's
thread manage is messy, some are `PriorityThreadPool` some a native pthread, It
is inconvient to trace some problem such as thread num increase up to thounds
and CPU load is very high.
Now, we introduce kudu's ThreadPool in #2915, and prepare to replace
some native pthread to ThreadPool #3416 , and I think we should also introduce
kudu's ThreadPoolMgr to manage ThreadPool, and collect metric such as `user cpu
time used`, `system cpu time used`, `context switches`, escepcially for plan
fragment executor's thread to help us positioning if the thread is doing a long
task which was unexpected or they are just waiting by potential deadlock
problems.
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