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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9420) Add percentile or max metric for rpcQueueTime, processing time
Date Mon, 06 Jan 2014 08:17:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13862839#comment-13862839

Hadoop QA commented on HADOOP-9420:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/3401//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/3401//console

This message is automatically generated.

> 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: Andrew Wang
>         Attachments: 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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