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https://issues.apache.org/jira/browse/SPARK-1412?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust updated SPARK-1412:
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Priority: Minor (was: Major)
> Disable partial aggregation automatically when reduction factor is low
> ----------------------------------------------------------------------
>
> Key: SPARK-1412
> URL: https://issues.apache.org/jira/browse/SPARK-1412
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.0.0
> Reporter: Reynold Xin
> Assignee: Michael Armbrust
> Priority: Minor
> Fix For: 1.1.0
>
>
> Once we see enough number of rows in partial aggregation and don't observe
> any reduction, the aggregate operator should just turn off partial
> aggregation.
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