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From "Sreekanth Ramakrishnan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1219) JobTracker Metrics causes undue load on JobTracker
Date Fri, 23 Apr 2010 08:33:55 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sreekanth Ramakrishnan updated MAPREDUCE-1219:
----------------------------------------------

    Attachment: MR-1219-2.patch

Incorporating Amareshwaris comment.

> 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.

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