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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15650) Remove TimeRangeTracker as point of contention when many threads reading a StoreFile
Date Tue, 05 Jul 2016 18:17:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15362924#comment-15362924
] 

Andrew Purtell commented on HBASE-15650:
----------------------------------------

Got it. Still fine to revert a perf improvement in a suspect area until we have a root cause.


> Remove TimeRangeTracker as point of contention when many threads reading a StoreFile
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-15650
>                 URL: https://issues.apache.org/jira/browse/HBASE-15650
>             Project: HBase
>          Issue Type: Bug
>          Components: Performance
>    Affects Versions: 2.0.0
>            Reporter: stack
>            Assignee: stack
>             Fix For: 2.0.0, 1.3.0, 0.98.19, 1.4.0
>
>         Attachments: 15650.branch-1.patch, 15650.branch-1.patch, 15650.patch, 15650.patch,
15650v2.branch-1.patch, 15650v2.patch, 15650v3.patch, 15650v4.patch, 15650v5.patch, 15650v6.patch,
Point-of-contention-on-random-read.png
>
>
> HBASE-12148 is about "Remove TimeRangeTracker as point of contention when many threads
writing a Store". It is also a point of contention when reading.



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