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https://issues.apache.org/jira/browse/HADOOP-12335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xianyin Xin updated HADOOP-12335:
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Attachment: ewma-preview.patch
A preview patch submitted.
> Add exponential weighted moving average in metrics2.util
> --------------------------------------------------------
>
> Key: HADOOP-12335
> URL: https://issues.apache.org/jira/browse/HADOOP-12335
> Project: Hadoop Common
> Issue Type: Improvement
> Components: metrics
> Reporter: Xianyin Xin
> Assignee: Xianyin Xin
> Attachments: ewma-preview.patch
>
>
> Sometimes we need to collect the average value of a variable, but for
> variables that is time related, the more recent value is more important. For
> example, we want to see the average container allocation rate in the last 5
> min. Exponential weighted moving average is a solution for this scenario.
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