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https://issues.apache.org/jira/browse/MAPREDUCE-6209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14285503#comment-14285503
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Tsuyoshi OZAWA commented on MAPREDUCE-6209:
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Karthik and Gera, thanks for your explanation. I got it. Do you have good
heuristics to decide base value for making the heap size propotional?
> Implement a heuristic to auto-size Java heap of MRAppMaster container
> proportional to the job size
> --------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6209
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6209
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: applicationmaster
> Reporter: Gera Shegalov
>
> The size of Java heap required by the AM is linearly proportional to the size
> of the MR job (number of mappers/splits and reducers). it would be nice if
> users did not have to adjust the AM container size when transitioning from
> testing job on a small sample to a production job on a full-scale dataset.
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