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https://issues.apache.org/jira/browse/HIVE-9561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326921#comment-14326921
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Rui Li commented on HIVE-9561:
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Thank you Xuefu!
> SHUFFLE_SORT should only be used for order by query [Spark Branch]
> ------------------------------------------------------------------
>
> Key: HIVE-9561
> URL: https://issues.apache.org/jira/browse/HIVE-9561
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Rui Li
> Assignee: Rui Li
> Fix For: spark-branch
>
> Attachments: HIVE-9561.1-spark.patch, HIVE-9561.2-spark.patch,
> HIVE-9561.3-spark.patch, HIVE-9561.4-spark.patch, HIVE-9561.5-spark.patch,
> HIVE-9561.6-spark.patch
>
>
> The {{sortByKey}} shuffle launches probe jobs. Such jobs can hurt performance
> and are difficult to control. So we should limit the use of {{sortByKey}} to
> order by query only.
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