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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2469) Task counters should also report the total heap usage of the task
Date Thu, 02 Jun 2011 03:17:47 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat updated MAPREDUCE-2469:
----------------------------------

       Resolution: Fixed
    Fix Version/s: 0.23.0
     Release Note: Task attempt's total heap usage gets recorded and published via counters
as COMMITTED_HEAP_BYTES.
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

I just committed the latest patch to trunk. Thanks Ravi, Santosh and Owen!

> 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
>             Fix For: 0.23.0
>
>         Attachments: 2469.v0.1.patch, mapreduce-2469-v1.1.patch, mapreduce-2469-v1.2.patch,
mapreduce-2469-v1.3.patch, mapreduce-2469-v1.4.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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