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https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15606424#comment-15606424
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stack commented on HBASE-16890:
-------------------------------
I did a primitive compare with 100 threads, 10 columns on WALPE. The classic
FSHLog in JFR shows a few instances of FSOutputSummer#write and
DFSOS#flushOrSync in samples (7 and 3 respectively). The asyncwal by contrast
has two orders of magnitude more points of contention showing up in samples at
append and sync (900 and 200). The sync on waitingConsumePayloads is a
throughput killer.
> 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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