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https://issues.apache.org/jira/browse/MAPREDUCE-1500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy updated MAPREDUCE-1500:
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Assignee: Arun C Murthy
A short-term fix might be to intern the strings... of course, MAPREDUCE-901
will help a *lot*.
> Improve the way Counters are managed by JobTracker
> --------------------------------------------------
>
> Key: MAPREDUCE-1500
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1500
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Reporter: Amar Kamat
> Assignee: Arun C Murthy
>
> Counters typically eat up a considerable amount of JobTracker's heap space.
> There is also a considerable heap space wastage due to duplicate Strings in
> Counters. Some amount of Counters' storage optimization can help reduce the
> load on JobTracker's memory.
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