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From "Jothi Padmanabhan (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1219) JobTracker Metrics causes undue load on JobTracker
Date Wed, 18 Nov 2009 04:35:39 GMT
JobTracker Metrics causes undue load on JobTracker

                 Key: MAPREDUCE-1219
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1219
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 0.21.0
            Reporter: Jothi Padmanabhan
            Assignee: Amareshwari Sriramadasu

JobTrackerMetricsInst.doUpdates updates job-level counters of all running jobs into JobTracker's
metrics causing very bad performance and hampers heartbeats. Since Job level metrics are better
served by JobHistory, it may be a good idea to remove these from the metrics framework.

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