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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11516) Track time spent in executing coprocessors in each region.
Date Thu, 17 Jul 2014 00:46:06 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14064418#comment-14064418
] 

Andrew Purtell commented on HBASE-11516:
----------------------------------------

Thinking about this more, we could easily do orders of magnitude more coprocessor upcalls
than HFile reads and writes and so using single aromic variables for counting will have a
big perf impact. Should consider something like Click's high scale counters. Boundary has
a maintained bug fixed version possibly worth moving to. 

If you'd like to try this while keeping all of the above in mind, great. If not, that's fine
also, please reassign to me and I'll take it up. 

> Track time spent in executing coprocessors in each region.
> ----------------------------------------------------------
>
>                 Key: HBASE-11516
>                 URL: https://issues.apache.org/jira/browse/HBASE-11516
>             Project: HBase
>          Issue Type: Improvement
>          Components: Coprocessors
>    Affects Versions: 0.98.4
>            Reporter: Srikanth Srungarapu
>            Assignee: Srikanth Srungarapu
>            Priority: Minor
>             Fix For: 0.98.5
>
>         Attachments: HBASE-11516.patch, HBASE-11516_v2.patch
>
>
> Currently, the time spent in executing coprocessors is not yet being tracked. This feature
can be handy for debugging coprocessors in case of any trouble.



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