[jira] Commented: (HADOOP-4435) The JobTracker should display the amount of heap memory used

["dhruba borthakur (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640357#action_12640357 ] 

dhruba borthakur commented on HADOOP-4435:
------------------------------------------

I propose to add the following two methods to ClusterSummary:

{code}
  /**
   * Get the total heap memory used by the <code>JobTracker</code>
   * 
   * @return the size of heap memory used by the <code>JobTracker</code>
   */
  public long getUsedMemory() {
    return used_memory;
  }

  /**
   * Get the maximum configured heap memory that can be used by the <code>JobTracker</code>
   * 
   * @return the configured size of max heap memory that can be used by the <code>JobTracker</code>
   */
  public long getMaxMemory() {
    return max_memory;
  }


{code}

> 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: Bug
>          Components: mapred
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>             Fix For: 0.19.0
>
>
> 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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