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https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15610823#comment-15610823
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Anoop Sam John commented on HBASE-16890:
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You mentioned abt the checksum calc is doing an on heap copy. AsyncWAL passes a
DBB for this. And the system under test was not having native CRC. So how abt
ur new tests? U changed so as to pass HBB? Or u make suer native crc libs
present?
> 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: AsyncWAL_disruptor.patch, Screen Shot 2016-10-25 at
> 7.34.47 PM.png, Screen Shot 2016-10-25 at 7.39.07 PM.png, Screen Shot
> 2016-10-25 at 7.39.48 PM.png, async.svg, classic.svg, 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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