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https://issues.apache.org/jira/browse/SPARK-12295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15083707#comment-15083707
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Apache Spark commented on SPARK-12295:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/10605
> Manage the memory used by window function
> -----------------------------------------
>
> Key: SPARK-12295
> URL: https://issues.apache.org/jira/browse/SPARK-12295
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Davies Liu
>
> The buffered rows for a given frame should use UnsafeRow, and stored as pages.
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