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https://issues.apache.org/jira/browse/HBASE-10156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872860#comment-13872860
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stack commented on HBASE-10156:
-------------------------------
I did measurement of latest patch and the time to complete is almost the same
as the previous patch with its run through updateLock on each append; the perf
output is miniscually better -- better instructions per cycle and less stalls
per cycle but only but a few percent... nothing to write home about. I was
thinking I'd seem some discernible improvement but unfortunately not.
> Fix up the HBASE-8755 slowdown when low contention
> --------------------------------------------------
>
> Key: HBASE-10156
> URL: https://issues.apache.org/jira/browse/HBASE-10156
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Reporter: stack
> Assignee: stack
> Attachments: 10156.txt, 10156v10.txt, 10156v11.txt, 10156v2.txt,
> 10156v3.txt, 10156v4.txt, 10156v5.txt, 10156v6.txt, 10156v7.txt, 10156v9.txt,
> Disrupting.java
>
>
> HBASE-8755 slows our writes when only a few clients. Fix.
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