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https://issues.apache.org/jira/browse/HBASE-11590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14951353#comment-14951353
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stack commented on HBASE-11590:
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bq. It is however incredible to see how faster/better it is compared to the
other pools.
It is in a different place altogether compared to the other two... in terms of
timing and threads used (maybe just because it is more parsimonious in its
thread use)? Man.
Thats a very nice compare there [~nkeywal] Sure on the FJP. Thats a substantial
enough change in perf. to make the change.
> 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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