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https://issues.apache.org/jira/browse/HADOOP-1899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eli Collins resolved HADOOP-1899.
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Resolution: Fixed
> the metrics system in the job tracker is running too often
> ----------------------------------------------------------
>
> Key: HADOOP-1899
> URL: https://issues.apache.org/jira/browse/HADOOP-1899
> Project: Hadoop Common
> Issue Type: Improvement
> Components: metrics
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
>
> The metrics system in the JobTracker is defaulting to every 5 seconds
> computing all of the counters for all of the jobs. This work is a substantial
> amount of work showing up as running in 20% of the snapshots that I've seen.
> I'd like to lower the default interval to once every 60 seconds and make it a
> low priority thread.
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