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Date: Thu, 28 May 2009 17:24:45 -0700 (PDT)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-5897) Add more Metrics to Namenode to
 capture heap usage
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     [ https://issues.apache.org/jira/browse/HADOOP-5897?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suresh Srinivas updated HADOOP-5897:
------------------------------------

    Attachment: stats.patch

Uploading a newer patch. Previous patch the unit test does not compile.

> 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
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>         Attachments: 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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