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https://issues.apache.org/jira/browse/HADOOP-10161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848938#comment-13848938
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Tsuyoshi OZAWA commented on HADOOP-10161:
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Hi Yang, thank you for reporting. Do you mean we should add a new method to
change default dmax value in the daemon to avoid forgetting configuring all
dmax value in hadoop daemons?
> In the hadoop metrics framework,The default value of dmax is 0, which means
> gmond process will never delete this metirc although it is disappeared.
> ---------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-10161
> URL: https://issues.apache.org/jira/browse/HADOOP-10161
> Project: Hadoop Common
> Issue Type: Improvement
> Components: metrics
> Affects Versions: 2.2.0
> Reporter: Yang He
> Attachments: HADOOP-10161_0_20131211.patch,
> hadoop-metrics.properties, hadoop-metrics2.properties
>
>
> The property of dmax in ganglia configration is metric dead time , when one
> metrics is disappeared ,so no more value of the metric will be emtic to the
> gmond,after 'dmax' seconds,then gmond will destroy the metric in memery . in
> hadoop metrics framework ,the default value is 0,which means the gmond will
> never destroy the metric althought the metric is disappeared ,the gmetad
> daemon also does not delete the rrdtool file ,and there does not have a
> method to configure the defualt value of dmax for all metrics .
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