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https://issues.apache.org/jira/browse/HADOOP-4435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643140#action_12643140
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Amar Kamat commented on HADOOP-4435:
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bq. What if we display heap-details as part of cluster-summary.
What I mean was to have _heap-info_ as a part of (i.e inside) the cluster
summary table and not at the header but I wrongly showed it as a part of the JT
info. Sorry for the confusion. So +1.
Few comments on the patch
1) I think changes to {{DatanodeDescriptor.java}} are unnecessary.
2) Deprecate {{FsShell.byteDesc()}} and {{FsShell.limitDecimalTo2()}}. Point
{{StringUtil.byteDesc()/StringUtil.limitDecimalTo2()}} in the comment.
3) Change the code that use {{FsShell.byteDesc()/FsShell.limitDecimalTo2}} to
use {{StringUtils.byteDesc()/StringUtil.limitDecimalTo2()}}.
4) Do we need to show the heap info through cli?
> 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, clusterSummary.patch,
> clusterSummary2.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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