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Posted to dev@hbase.apache.org by "Nicolas Liochon (JIRA)" <ji...@apache.org> on 2014/07/25 14:06:38 UTC

[jira] [Created] (HBASE-11590) use a specific ThreadPoolExecutor

Nicolas Liochon created HBASE-11590:
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             Summary: use a specific ThreadPoolExecutor
                 Key: HBASE-11590
                 URL: https://issues.apache.org/jira/browse/HBASE-11590
             Project: HBase
          Issue Type: Bug
          Components: Client, Performance
    Affects Versions: 1.0.0, 2.0.0
            Reporter: Nicolas Liochon
            Assignee: Nicolas Liochon
            Priority: Minor
             Fix For: 1.0.0, 2.0.0


The JDK TPE creates all the threads in the pool. As a consequence, we create (by default) 256 threads even if we just need a few.

The attached TPE create threads only if we have something in the queue.
On a PE test with replica on, it improved the 99 latency percentile by 5%. 

Warning: there are likely some race conditions, but I'm posting it here because there is may be an implementation available somewhere we can use, or a good reason not to do that. So feedback welcome as usual. 




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