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

["Nicolas Liochon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-11590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nicolas Liochon updated HBASE-11590:
------------------------------------
    Attachment: ExecutorServiceTest.java
                UnitQueuePU.java
                UnitQueueP.java
                LifoThreadPoolExecutorSQP.java

> 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: 2.0.0
>
>         Attachments: ExecutorServiceTest.java, LifoThreadPoolExecutorSQP.java, UnitQueueP.java, UnitQueuePU.java, tp.patch
>
>
> 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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