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https://issues.apache.org/jira/browse/HADOOP-10161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848958#comment-13848958
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Tsuyoshi OZAWA commented on HADOOP-10161:
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Fixed typos in description. Please fix it if you find my mistakes.
> Add a method to change the default value of dmax in hadoop.properties
> ---------------------------------------------------------------------
>
> 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 is a configurable time to rotate metrics.
> Therefore no more value of the metric will be emit to the gmond, after 'dmax'
> seconds, then gmond will destroy the metric in memory. In hadoop metrics
> framework , the default value is 0, which means the gmond will never destroy
> the metric although the metric is disappeared. The gmetad daemon also does
> not delete the rrdtool file.
> We need to add a method to configure the default value of dmax for all
> metrics in hadoop.propertis.
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