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https://issues.apache.org/jira/browse/SPARK-54502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hongze Zhang updated SPARK-54502:
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Parent: SPARK-54089
Issue Type: Sub-task (was: Improvement)
> Support off-heap memory mode for hash relations in broadcast hash join
> ----------------------------------------------------------------------
>
> Key: SPARK-54502
> URL: https://issues.apache.org/jira/browse/SPARK-54502
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.0.1
> Reporter: Hongze Zhang
> Priority: Major
>
> Currently Spark is hard coded to use on-heap memory mode for broadcast hash
> join. It was because the broadcasted hash tables don't have a certain
> lifecycle so need to be managed by GC to avoid memory leak. Though this will
> cause waste of JVM heap memory when off-heap memory mode is enabled.
> This will aim to improve the design and code to add off-heap support for
> broadcast hash join.
>
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