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From "Cindy Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4710) Add peak memory usage counter for each task
Date Fri, 05 Oct 2012 18:48:05 GMT
Cindy Li created MAPREDUCE-4710:
-----------------------------------

             Summary: 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


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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