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https://issues.apache.org/jira/browse/HDFS-15176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17040354#comment-17040354
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Íñigo Goiri commented on HDFS-15176:
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+1 on [^HDFS-15176.004.patch].
> Enable GcTimePercentage Metric in NameNode's JvmMetrics.
> --------------------------------------------------------
>
> Key: HDFS-15176
> URL: https://issues.apache.org/jira/browse/HDFS-15176
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Jinglun
> Assignee: Jinglun
> Priority: Minor
> Attachments: HDFS-15176.001.patch, HDFS-15176.002.patch,
> HDFS-15176.003.patch, HDFS-15176.004.patch
>
>
> The GcTimePercentage(computed by GcTimeMonitor) could be used as a dimension
> to analyze the NameNode GC. We should add a switch config to enable the
> GcTimePercentage metric in HDFS.
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