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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15163) Add sampling code and metrics for get/scan/multi/mutate count separately
Date Tue, 26 Jan 2016 04:58:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15116687#comment-15116687
] 

Elliott Clark commented on HBASE-15163:
---------------------------------------

bq.Yes but they are not histogram, so still have the 'instantaneous rate is controlled by
how long inbetween metrics snapshots' issue, right? 
No they are continuous counting metrics. If the metrics snapshots once when there's a spike
and another time when there's not then the spike isn't lost, just averaged out.

For rate that's computed once per snapshot that information is lost.

> Add sampling code and metrics for get/scan/multi/mutate count separately
> ------------------------------------------------------------------------
>
>                 Key: HBASE-15163
>                 URL: https://issues.apache.org/jira/browse/HBASE-15163
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Yu Li
>            Assignee: Yu Li
>         Attachments: DifferentRequestQPS.png, HBASE-15163.patch
>
>
> This way we could see QPS of different kinds of requests, to better analyze what's causing
hot spot in system



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