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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9420) Add percentile or max metric for rpcQueueTime, processing time
Date Thu, 09 Jan 2014 23:43:50 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HADOOP-9420:
--------------------------------

       Resolution: Fixed
    Fix Version/s: 2.4.0
           Status: Resolved  (was: Patch Available)

Committed to trunk and branch-2, thanks for your contribution!

> Add percentile or max metric for rpcQueueTime, processing time
> --------------------------------------------------------------
>
>                 Key: HADOOP-9420
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9420
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc, metrics
>    Affects Versions: 2.0.3-alpha
>            Reporter: Todd Lipcon
>            Assignee: Liang Xie
>             Fix For: 2.4.0
>
>         Attachments: HADOOP-9420-v2.txt, HADOOP-9420.txt
>
>
> Currently, we only export averages for rpcQueueTime and rpcProcessingTime. These metrics
are most useful when looking at timeouts and slow responses, which in my experience are often
caused by momentary spikes in load, which won't show up in averages over the 15+ second time
intervals often used by metrics systems. We should collect at least the max queuetime and
processing time over each interval, or the percentiles if it's not too expensive.



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