[jira] [Commented] (HADOOP-18426) Improve the accuracy of MutableStat mean

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-18426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17585462#comment-17585462 ] 

ASF GitHub Bot commented on HADOOP-18426:
-----------------------------------------

zhangshuyan0 opened a new pull request, #4811:
URL: https://github.com/apache/hadoop/pull/4811

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> Improve the accuracy of MutableStat mean
> ----------------------------------------
>
>                 Key: HADOOP-18426
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18426
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Shuyan Zhang
>            Priority: Major
>
> The current MutableStat mean calculation method is more prone to loss accuracy because the sum of samples is too large. We can process each sample on its own to improve mean accuracy.



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