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From "Vladimir Rodionov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11854) MetricsRegion.updateScanNext takes 20% of overall RegionScannerImpl.nextRaw call
Date Thu, 28 Aug 2014 18:58:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14114161#comment-14114161
] 

Vladimir Rodionov commented on HBASE-11854:
-------------------------------------------

MutableHistogram.add takes most of the time. One of the ideas is not to call this update on
every nextRaw (J. Leach).

> MetricsRegion.updateScanNext takes 20% of overall RegionScannerImpl.nextRaw call
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-11854
>                 URL: https://issues.apache.org/jira/browse/HBASE-11854
>             Project: HBase
>          Issue Type: Bug
>          Components: metrics, Performance, Scanners
>    Affects Versions: 0.98.6
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>
> From our internal profiling we were surprised by amount of time spent in this call. Further
investigation is needed.



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