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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 Wed, 17 Jun 2009 19:20:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720840#action_12720840
] 

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

Integrated in Hadoop-trunk #869 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/869/])
    

> Add more Metrics to Namenode to capture heap usage
> --------------------------------------------------
>
>                 Key: HADOOP-5897
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5897
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs, metrics
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.21.0
>
>         Attachments: 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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