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https://issues.apache.org/jira/browse/MAPREDUCE-4710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472146#comment-13472146
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Arun C Murthy commented on MAPREDUCE-4710:
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Cindy - thanks for the patch. As Harsh explained you'll have to port this patch
to trunk also. Please let me know if you need any help with that.
One comment on the patch - rather than track peak memory in Task.java I'd
rather have a getPeakMemory interface defined in the ProcResourceValues
structure so that the logic for this is all in one place. Makes sense? Thanks.
> Add peak memory usage counter for each task
> -------------------------------------------
>
> Key: MAPREDUCE-4710
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4710
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: task
> Affects Versions: 1.0.2
> Reporter: Cindy Li
> Priority: Minor
> Labels: patch
> Attachments: mapreduce-4710.patch
>
>
> Each task has counters PHYSICAL_MEMORY_BYTES and VIRTUAL_MEMORY_BYTES, which
> are snapshots of memory usage of that task. They are not sufficient for users
> to understand peak memory usage by that task, e.g. in order to diagnose task
> failures, tune job parameters or change application design. This new feature
> will add two more counters for each task: PHYSICAL_MEMORY_BYTES_MAX and
> VIRTUAL_MEMORY_BYTES_MAX.
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