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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5897) Add more Metrics to Namenode to capture heap usage
Date Fri, 22 May 2009 17:20:45 GMT
Add more Metrics to Namenode to capture heap usage
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                 Key: HADOOP-5897
                 URL: https://issues.apache.org/jira/browse/HADOOP-5897
             Project: Hadoop Core
          Issue Type: Improvement
            Reporter: Suresh Srinivas
            Assignee: Suresh Srinivas


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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