Bharath Vissapragada created HBASE-25547:
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Summary: Thread pools should release unused resources
Key: HBASE-25547
URL: https://issues.apache.org/jira/browse/HBASE-25547
Project: HBase
Issue Type: Improvement
Components: master, regionserver
Affects Versions: 3.0.0-alpha-1, 1.7.0, 2.5.0
Reporter: Bharath Vissapragada
Assignee: Bharath Vissapragada
On this [PR|https://github.com/apache/hbase/pull/2909] [~stack] rightly pointed
out that the thread pool just spins up threads that remain idle for 99.999% of
time. Java's
[ThreadPoolExecutor|https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/ThreadPoolExecutor.html]
lets us tune some configurations like the following for releasing the unused
resources
* corePoolSize
* keepAliveTimeMs
* allowCoreThreadTimeOut
Current code makes it difficult to pass along these configurations to the
executor service. Refactor and fix the defaults for low-priority thread pools
to release resources quicker.
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