[jira] [Commented] (SPARK-25947) Reduce memory usage in ShuffleExchangeExec by selecting only the sort columns

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-25947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16677513#comment-16677513 ] 

Apache Spark commented on SPARK-25947:
--------------------------------------

User 'mu5358271' has created a pull request for this issue:
https://github.com/apache/spark/pull/22961

> Reduce memory usage in ShuffleExchangeExec by selecting only the sort columns
> -----------------------------------------------------------------------------
>
>                 Key: SPARK-25947
>                 URL: https://issues.apache.org/jira/browse/SPARK-25947
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.3.2
>            Reporter: Shuheng Dai
>            Priority: Major
>
> When sorting rows, ShuffleExchangeExec uses the entire row instead of just the columns references in SortOrder to create the RangePartitioner. This causes the RangePartitioner to sample entire rows to create rangeBounds and can cause OOM issues on the driver when rows contain large fields.
> Create a projection and only use columns involved in the SortOrder for the RangePartitioner



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