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https://issues.apache.org/jira/browse/HBASE-20806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16536958#comment-16536958
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Abhishek Singh Chouhan commented on HBASE-20806:
------------------------------------------------
Have attached the patch for branch-2 which can be applied to release branches
branch-2.x if needed (same as the patch for master but was not being applied
cleanly due to a semicolon present here
[https://github.com/apache/hbase/blob/branch-2/hbase-server/src/main/java/org/apache/hadoop/hbase/monitoring/MonitoredTask.java#L33]
which is missing in master).
> Split style journal for flushes and compactions
> -----------------------------------------------
>
> Key: HBASE-20806
> URL: https://issues.apache.org/jira/browse/HBASE-20806
> Project: HBase
> Issue Type: Improvement
> Reporter: Abhishek Singh Chouhan
> Assignee: Abhishek Singh Chouhan
> Priority: Minor
> Attachments: HBASE-20806.branch-1.001.patch,
> HBASE-20806.branch-1.002.patch, HBASE-20806.branch-1.003.patch,
> HBASE-20806.branch-2.001.patch, HBASE-20806.master.001.patch,
> HBASE-20806.master.002.patch, HBASE-20806.master.003.patch
>
>
> In 1.x we have split transaction journal that gives a clear picture of when
> various stages of splits took place. We should have a similar thing for
> flushes and compactions so as to have insights into time spent in various
> stages, which we can use to identify regressions that might creep up.
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