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https://issues.apache.org/jira/browse/SPARK-23516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liuxian reopened SPARK-23516:
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> I think it is unnecessary to transfer unroll memory to storage memory 
> ----------------------------------------------------------------------
>
>                 Key: SPARK-23516
>                 URL: https://issues.apache.org/jira/browse/SPARK-23516
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 3.0.0
>            Reporter: liuxian
>            Priority: Minor
>
> Now _StaticMemoryManager_ mode has been removed.
>  And for _UnifiedMemoryManager_,  unroll memory is also storage memory, so I 
> think it is unnecessary to release unroll memory really,  and then to get 
> storage memory again.



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