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Posted to mapreduce-issues@hadoop.apache.org by "Varene Olivier (JIRA)" <ji...@apache.org> on 2012/12/10 11:03:21 UTC

[jira] [Created] (MAPREDUCE-4866) ShuffleRamManager is limited to 2Gb of memory - we should increase that

Varene Olivier created MAPREDUCE-4866:
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             Summary: ShuffleRamManager is limited to 2Gb of memory - we should increase that
                 Key: MAPREDUCE-4866
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4866
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: mrv1
    Affects Versions: 0.20.2
         Environment: linux, 64bits cpu, more than 2Gb of memory for each reducer tasks
            Reporter: Varene Olivier
            Priority: Minor


Inside the org.apache.hadoop.mapred.ReduceTask.java, the *ShuffleRamManager* is limited to allocate up to 2Gb of memory during the shuffle phase. 
We should be able to allocate more, to take advantage of the full memory we have on servers.

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