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From "Yusaku Sako (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-1946) Heatmap memory should not include cached memory as part of "used"
Date Tue, 16 Apr 2013 20:01:16 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-1946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633273#comment-13633273
] 

Yusaku Sako commented on AMBARI-1946:
-------------------------------------

Committed to trunk.  Thanks Jeff!
                
> Heatmap memory should not include cached memory as part of "used"
> -----------------------------------------------------------------
>
>                 Key: AMBARI-1946
>                 URL: https://issues.apache.org/jira/browse/AMBARI-1946
>             Project: Ambari
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.2.2
>            Reporter: Jeff Sposetti
>            Assignee: Jeff Sposetti
>             Fix For: 1.3.0
>
>         Attachments: AMBARI-1946.patch
>
>
> The "Memory Used %" is currently calculated using the formula:
> (mem_total - mem_free)/mem_total
> Although this is accurate, the total includes mem_cached (file system cache), which the
kernal can take back whenever it wants to.
> Therefore, formula can be doing this instead to treat cache as free:
> (mem_total - mem_free - mem_cached)/mem_total

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