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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2469) Task counters should also report the total heap usage of the task
Date Mon, 30 May 2011 18:37:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13041226#comment-13041226
] 

Owen O'Malley commented on MAPREDUCE-2469:
------------------------------------------

The patch looks good. I don't see how the patch could be causing the testcase failures or
the findbugs warnings.

> Task counters should also report the total heap usage of the task
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-2469
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2469
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: task
>    Affects Versions: 0.23.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>              Labels: mapreduce
>         Attachments: 2469.v0.1.patch, mapreduce-2469-v1.1.patch
>
>
> Currently, the task counters report VSS and RSS usage of the task. The task counter should
also report the total heap usage of the task also. The task might be configured with a max
heap size of M but the task's total heap usage might only be H, where H < M. In such a
case, knowing only M doesn't provide a complete picture of the task's memory usage.  

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