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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12779) SplitTransaction: Add metrics
Date Mon, 05 Jan 2015 06:42:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14264231#comment-14264231
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Lars Hofhansl commented on HBASE-12779:
---------------------------------------

Hmm... So while testing the metrics I find we already have this as a region server metric:

{noformat}
    "splitTime_num_ops" : 1,
    "splitTime_min" : 261,
    "splitTime_max" : 261,
    "splitTime_mean" : 261.0,
    "splitTime_median" : 261.0,
    "splitTime_75th_percentile" : 261.0,
    "splitTime_95th_percentile" : 261.0,
    "splitTime_99th_percentile" : 261.0
{noformat}

While perhaps not entirely intuitive we already have the number of the successful splits at
least in {{splitTime_num_ops}}, which acts just as a counter. That counter is increased whether
the split was successful or not. So, not sure whether this patch is going to add much.

Maybe the splitTime histogram metric should instead be more prominently explained in the book...?

> SplitTransaction: Add metrics
> -----------------------------
>
>                 Key: HBASE-12779
>                 URL: https://issues.apache.org/jira/browse/HBASE-12779
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>             Fix For: 2.0.0, 0.98.10, 1.0.1, 0.94.27
>
>         Attachments: 12779-v2-0.98.txt, 12779-v2.txt, 12779.txt
>
>




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