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From "David Bowen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1562) Report Java VM metrics
Date Sat, 07 Jul 2007 00:16:04 GMT

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

David Bowen updated HADOOP-1562:

    Status: Open  (was: Patch Available)

Withdrawing this version of the patch since I'd like to make the metrics-related code better
encapsulated.  Also, while I'm changing this part of the system anyway, Nigel suggested it
would be useful to attach the session id to DFS metrics too.

> 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
> 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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