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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-15971) Regression: Random Read/WorkloadC slower in 1.x than 0.98
Date Sat, 11 Jun 2016 18:29:21 GMT

     [ https://issues.apache.org/jira/browse/HBASE-15971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-15971:
--------------------------
    Attachment: flight_recording_10172402220203_28.branch-1.jfr

For branch-1

> 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, HBASE-15971.branch-1.001.patch, Screen Shot
2016-06-10 at 5.08.24 PM.png, Screen Shot 2016-06-10 at 5.08.26 PM.png, branch-1.hits.png,
branch-1.png, flight_recording_10172402220203_28.branch-1.jfr, flight_recording_10172402220203_29.09820.0.98.20.jfr,
handlers.fp.png, hits.fp.png, hits.patched1.0.vs.unpatched1.0.vs.098.png, run_ycsb.sh
>
>
> 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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