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https://issues.apache.org/jira/browse/SPARK-22483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16246203#comment-16246203
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Apache Spark commented on SPARK-22483:
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User 'vundela' has created a pull request for this issue:
https://github.com/apache/spark/pull/19709

> Exposing java.nio bufferedPool memory metrics to metrics system
> ---------------------------------------------------------------
>
>                 Key: SPARK-22483
>                 URL: https://issues.apache.org/jira/browse/SPARK-22483
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>    Affects Versions: 2.2.0
>            Reporter: Srinivasa Reddy Vundela
>
> Spark currently exposes on-heap and off-heap memory of JVM to metric system. 
> Currently there is no way to know how much direct/mapped memory allocated for 
> java.nio buffered pools. 



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