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https://issues.apache.org/jira/browse/SPARK-26539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-26539.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 23457
[https://github.com/apache/spark/pull/23457]
> Remove spark.memory.useLegacyMode memory settings + StaticMemoryManager
> -----------------------------------------------------------------------
>
> Key: SPARK-26539
> URL: https://issues.apache.org/jira/browse/SPARK-26539
> Project: Spark
> Issue Type: Task
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Sean Owen
> Assignee: Sean Owen
> Priority: Major
> Labels: release-notes
> Fix For: 3.0.0
>
>
> The old memory manager was superseded by UnifiedMemoryManager in Spark 1.6,
> and has been the default since. I think we could remove it to simplify the
> code a little, but more importantly to reduce the variety of memory settings
> users are confronted with when using Spark.
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