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https://issues.apache.org/jira/browse/HADOOP-4435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640614#action_12640614
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Owen O'Malley commented on HADOOP-4435:
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It is still *not* a blocker. It is a feature you wish had made the 0.19 release.
> The JobTracker should display the amount of heap memory used
> ------------------------------------------------------------
>
> Key: HADOOP-4435
> URL: https://issues.apache.org/jira/browse/HADOOP-4435
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Priority: Minor
> Fix For: 0.20.0
>
> Attachments: clusterSummary.patch
>
>
> It would be nice to make the JobTracker UI display the amount of heap memory
> currently in use. This is similar to the DFS UI that already displays the
> amount if heap memory used by the NameNode.
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