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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-11590) use a specific ThreadPoolExecutor
Date Fri, 25 Jul 2014 12:06:38 GMT
Nicolas Liochon created HBASE-11590:

             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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