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https://issues.apache.org/jira/browse/SPARK-56410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Jie resolved SPARK-56410.
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Fix Version/s: 4.2.0
Resolution: Fixed
Issue resolved by pull request 55275
[https://github.com/apache/spark/pull/55275]
> Add bounded k-way merge support in UnsafeExternalSorter
> -------------------------------------------------------
>
> Key: SPARK-56410
> URL: https://issues.apache.org/jira/browse/SPARK-56410
> Project: Spark
> Issue Type: Task
> Components: Spark Core, SQL
> Affects Versions: 4.1.1
> Reporter: Tengfei Huang
> Assignee: Tengfei Huang
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.2.0
>
>
> Currently the UnsafeExternalSorter will merge all the spills at once which
> will need lots of memory, increases OOM risks for large jobs.
> Propose to add bounded k-way merge to remove the risk.
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