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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-16890) Analyze the performance of AsyncWAL and fix the same
Date Fri, 21 Oct 2016 05:01:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

ramkrishna.s.vasudevan updated HBASE-16890:
    Attachment: contention.png

When we try to load 15G of data but with 50 threads and we do a profile for 1 min. We could
see that in AsyncWAL case we have contention in the 'waitingConsumePayloads' ArrayDeque. But
in the default case there is not much contention as you can see in the snapshots attached.

> Analyze the performance of AsyncWAL and fix the same
> ----------------------------------------------------
>                 Key: HBASE-16890
>                 URL: https://issues.apache.org/jira/browse/HBASE-16890
>             Project: HBase
>          Issue Type: Sub-task
>          Components: wal
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0
>         Attachments: contention.png, contention_defaultWAL.png
> Tests reveal that AsyncWAL under load in single node cluster performs slower than the
Default WAL. This task is to analyze and see if we could fix it.
> See some discussions in the tail of JIRA HBASE-15536.

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