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https://issues.apache.org/jira/browse/AMBARI-15892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aravindan Vijayan reopened AMBARI-15892:
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Change should be made for another widget - Yarn Home : Cluster Memory.
> Incorrect (Negative) values are shown for memory metrics
> --------------------------------------------------------
>
> Key: AMBARI-15892
> URL: https://issues.apache.org/jira/browse/AMBARI-15892
> Project: Ambari
> Issue Type: Bug
> Reporter: Aravindan Vijayan
> Assignee: Aravindan Vijayan
> Priority: Blocker
> Attachments: AMBARI-15892-2.patch, AMBARI-15892.patch
>
>
> Issue
> In the "NameNode HostLoad" graph, the negative values are seen for the
> computed metric "Memory Utilization" which goes by the formula :
> ( mem_total - (mem_free + mem_cache) ) *100 / mem_total
> Bug
> AMBARI-15448 changed the way memory metrics are being reported to AMS. This
> lead to a double subtraction of mem_cached, thereby leading to a negative
> value intermittently.
> Fix
> Change the widget to :
> ( mem_total - mem_free ) *100 / mem_total
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