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Date: Mon, 24 Oct 2016 19:35:58 +0000 (UTC)
From: "stack (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.13013981.1476985659000.70556.1477337758467@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-16890) Analyze the performance of
 AsyncWAL and fix the same
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archived-at: Mon, 24 Oct 2016 19:36:00 -0000


    [ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15602972#comment-15602972 ] 

stack commented on HBASE-16890:
-------------------------------

Looking at the histograms, if to be believed, then we are sync'ing more in asyncwal; less aggregation.  That synchronize on payloads will be popular. Looks like plenty of opportunity for speedup. Want to put up a patch w/ yours so far [~ram_krish]?

> 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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