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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1562) Report Java VM metrics
Date Tue, 10 Jul 2007 19:12:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12511540

Hadoop QA commented on HADOOP-1562:


http://issues.apache.org/jira/secure/attachment/12361458/1562_3.patch applied and successfully
tested against trunk revision r554811.

Test results:   http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/391/testReport/
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/391/console

> Report Java VM metrics
> ----------------------
>                 Key: HADOOP-1562
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1562
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: metrics
>            Reporter: David Bowen
>            Assignee: David Bowen
>         Attachments: 1562.patch, 1562_1.patch, 1562_2.patch, 1562_3.patch
> It would be useful to have each Java process in Hadoop (JobTracker, TaskTracker, NameNode
and DataNode) report some Java VM metrics.  E.g. heap/non-heap memory used/committed, number
of garbage collections and percentage of time spent in GC, number of threads that are runnable/blocked/waiting/etc.

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