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Amareshwari Sriramadasu commented on MAPREDUCE-1219: ---------------------------------------------------- +1 patch looks good. > 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: Sreekanth Ramakrishnan > Attachments: MAPREDUCE-1219.patch, MR-1219-1.patch, MR-1219-2.patch, > patch-1219-ydist.txt > > > 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. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.