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https://issues.apache.org/jira/browse/HBASE-15971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317366#comment-15317366
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Mikhail Antonov commented on HBASE-15971:
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Ouch.
Do you have any feeling at what point this regression creeped in? Likely a
blocker for 1.3 (and other branches). Also from the posted charts I'm not sure
I immediately see lower ipc readers, but numCallsInGeneralQueue is different
drastically..
> Regression: Random Read/WorkloadC slower in 1.x than 0.98
> ---------------------------------------------------------
>
> Key: HBASE-15971
> URL: https://issues.apache.org/jira/browse/HBASE-15971
> Project: HBase
> Issue Type: Sub-task
> Components: rpc
> Reporter: stack
> Assignee: stack
> Priority: Critical
> Attachments: 098.hits.png, 098.png, branch-1.hits.png, branch-1.png
>
>
> branch-1 is slower than 0.98 doing YCSB random read/workloadC. It seems to be
> doing about 1/2 the throughput of 0.98.
> In branch-1, we have low handler occupancy compared to 0.98. Hacking in
> reader thread occupancy metric, is about the same in both. In parent issue,
> hacking out the scheduler, I am able to get branch-1 to go 3x faster so will
> dig in here.
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