Github user kevinyu98 commented on the pull request: https://github.com/apache/spark/pull/10314#issuecomment-169238048 @viirya @yhuai @srowen @marmbrus @concretevitamin: SHUFFLE_TARGET_POSTSHUFFLE_INPUT_SIZE was added by spark-9850, PR#9276, I am including Yin , Michael set the autoBroadcastJoinThreshold to 10 * 1024 * 1024 through PR3064, spark-2393 set the autoBroadcastJoinThreshold to Int. I am not sure which one to choose either, so I cc on the persons who introduce these two fields. Thanks for your input.
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