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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6279) Add JVM memory usage to JvmMetrics
Date Fri, 09 Oct 2009 11:10:31 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763972#action_12763972
] 

Hudson commented on HADOOP-6279:
--------------------------------

Integrated in Hadoop-Common-trunk #122 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Common-trunk/122/])
    . Add Runtime::maxMemory to JVM metrics. Contributed by Todd Lipcon


> Add JVM memory usage to JvmMetrics
> ----------------------------------
>
>                 Key: HADOOP-6279
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6279
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 0.20.2, 0.21.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: 0.22.0
>
>         Attachments: hadoop-6279.txt
>
>
> The JvmMetrics currently publish memory usage from the MemoryMXBean. This is useful,
but doesn't include the total heap size (eg as displayed in the JT Web UI).
> It would be nice to expose Runtime.getRuntime().maxMemory() as part of JvmMetrics.
> It seems that Runtime.getRuntime().totalMemory() (used by the JT for "memory used") is
the same as the 'memHeapCommittedM' which already exists.

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