Reynold Xin created SPARK-1412:
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Summary: 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
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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