justinuang commented on issue #20303: [SPARK-23128][SQL] A new approach to do adaptive execution in Spark SQL URL: https://github.com/apache/spark/pull/20303#issuecomment-459414987 @carsonwang I'm curious if you were able to break down the benefits of setting the reducer number separately from everything else? We noticed that spark sql ended up creating 200 partitions, not the tens of thousands that you described in your article, and also that the task overhead wasn't that big.
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