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Posted to issues@hbase.apache.org by "Yechao Chen (JIRA)" <ji...@apache.org> on 2017/09/07 10:19:00 UTC

[jira] [Commented] (HBASE-7612) [JDK8] Replace use of high-scale-lib counters with intrinsic facilities

    [ https://issues.apache.org/jira/browse/HBASE-7612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156778#comment-16156778 ] 

Yechao Chen commented on HBASE-7612:
------------------------------------

I will submit a patch later

> [JDK8] Replace use of high-scale-lib counters with intrinsic facilities
> -----------------------------------------------------------------------
>
>                 Key: HBASE-7612
>                 URL: https://issues.apache.org/jira/browse/HBASE-7612
>             Project: HBase
>          Issue Type: Sub-task
>          Components: metrics
>    Affects Versions: 2.0.0
>            Reporter: Andrew Purtell
>            Assignee: Duo Zhang
>            Priority: Trivial
>             Fix For: 2.0.0
>
>         Attachments: HBASE-7612.patch, HBASE-7612-v1.patch
>
>
> JEP155 introduces a few new classes (DoubleAccumulator, DoubleAdder, LongAccumulator, LongAdder) that "internally employ contention-reduction techniques that provide huge throughput improvements as compared to Atomic variables". There are applications of these where we are currently using Cliff Click's high-scale-lib and for metrics.
> See http://openjdk.java.net/jeps/155



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