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https://issues.apache.org/jira/browse/SPARK-17019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15418305#comment-15418305
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Apache Spark commented on SPARK-17019:
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User 'jerryshao' has created a pull request for this issue:
https://github.com/apache/spark/pull/14617
> Expose off-heap memory usage in various places
> ----------------------------------------------
>
> Key: SPARK-17019
> URL: https://issues.apache.org/jira/browse/SPARK-17019
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.0.0
> Reporter: Saisai Shao
> Priority: Minor
>
> With SPARK-13992, Spark supports persisting data into off-heap memory, but
> the usage of off-heap is not exposed currently, it is not so convenient for
> user to monitor and profile, so here propose to expose off-heap memory as
> well as on-heap memory usage in various places:
> 1. Spark UI's executor page will display both on-heap and off-heap memory
> usage.
> 2. REST request returns both on-heap and off-heap memory.
> 3. Also these two memory usage can be obtained programmatically from
> SparkListener.
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