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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4369) Metric Averages are not averages
Date Mon, 20 Oct 2008 17:59:44 GMT

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

Tsz Wo (Nicholas), SZE updated HADOOP-4369:
-------------------------------------------

    Status: Open  (was: Patch Available)

> 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
>            Priority: Blocker
>             Fix For: 0.18.2
>
>         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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