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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5897) Add more Metrics to Namenode to capture heap usage
Date Sat, 27 Jun 2009 11:10:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724840#action_12724840
] 

Hudson commented on HADOOP-5897:
--------------------------------

Integrated in Hadoop-Common-trunk #9 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Common-trunk/9/])
    . Promote new name-node metrics to  branch 0.20.


> Add more Metrics to Namenode to capture heap usage
> --------------------------------------------------
>
>                 Key: HADOOP-5897
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5897
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: dfs, metrics
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.21.0
>
>         Attachments: 5897.rel20.patch, stats.1.patch, stats.patch, stats.patch
>
>
> Recently we had GC issues, where Namenode used more heap than usual. There was no growth
indicated by the data in current Metrics to justify the heap usage. Adding more stats such
as:
> - Counter to track blocks that are pending deletion
> - BlocksMap hashmap capacity
> - Counter to track excess number of blocks 

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