[jira] [Created] (SPARK-2680) Lower spark.shuffle.memoryFraction to 0.2 by default

[Matei Zaharia (JIRA)]

Matei Zaharia created SPARK-2680:
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             Summary: Lower spark.shuffle.memoryFraction to 0.2 by default
                 Key: SPARK-2680
                 URL: https://issues.apache.org/jira/browse/SPARK-2680
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
            Reporter: Matei Zaharia
            Priority: Minor
             Fix For: 1.1.0


Seems like it's good to be more conservative on this, in particular to try to 
fit all the data in the young gen. People can always increase it for 
performance.



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