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Posted to common-dev@hadoop.apache.org by "Brian Bockelman (JIRA)" <ji...@apache.org> on 2008/10/08 02:06:44 UTC

[jira] Updated: (HADOOP-4369) Metric Averages are not averages

     [ https://issues.apache.org/jira/browse/HADOOP-4369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Bockelman updated HADOOP-4369:
------------------------------------

    Attachment: hadoop-4369.patch

Patch to make averages actually averages in the Hadoops metric package.

> Metric Averages are not averages
> --------------------------------
>
>                 Key: HADOOP-4369
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4369
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 0.18.1
>            Reporter: Brian Bockelman
>             Fix For: 0.18.1
>
>         Attachments: hadoop-4369.patch
>
>   Original Estimate: 0.17h
>  Remaining Estimate: 0.17h
>
> Metrics averages are not averages; instead of updating the metric with the average number periodically, Hadoop metrics *increments* the metric.
> I.e., each update we have value = old_value + current average.  Instead, we want each update to have value = current_average.
> Patch will be attached momentarily.

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