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https://issues.apache.org/jira/browse/SPARK-9550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14652001#comment-14652001
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Josh Rosen commented on SPARK-9550:
-----------------------------------
Memory defaults changed (will find JIRA links later):
https://github.com/apache/spark/pull/7896
> Configuration renaming, defaults changes, and deprecation for 1.5.0 (master
> ticket)
> -----------------------------------------------------------------------------------
>
> Key: SPARK-9550
> URL: https://issues.apache.org/jira/browse/SPARK-9550
> Project: Spark
> Issue Type: Task
> Components: Spark Core, SQL
> Affects Versions: 1.5.0
> Reporter: Josh Rosen
> Priority: Blocker
>
> This ticket tracks configurations which need to be renamed, deprecated, or
> have their defaults changed for Spark 1.5.0.
> Note that subtasks / comments here do not necessarily need to reflect changes
> that must be performed. Rather, tasks should be added here to make sure that
> the relevant configurations are at least checked before we cut releases.
> This ticket will also help us to track configuration changes which must make
> it into the release notes.
> *Configuration renaming*
> - Consider renaming {{spark.shuffle.memoryFraction}} to
> {{spark.execution.memoryFraction}}
> ([discussion|https://github.com/apache/spark/pull/7770#discussion-diff-36019144]).
> - Rename all public-facing uses of {{unsafe}} to something less scary, such
> as {{tungsten}}
> *Defaults changes*
> - Codegen is now enabled by default.
> - Tungsten is now enabled by default.
> - Parquet schema merging is now disabled by default.
> - In-memory relation partition pruning should be enabled by default.
> *Deprecation*
> - Local execution has been removed.
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