carsonwang 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-475522814 @justinuang , sorry for late reply. For `df.repartition(500)`, AE does use the specified number for repartition. That is, each stage will writes the map output with 500 partitions. However, in the following up stage, AE may launch tasks less than 500 as one task can process multiple continues blocks.
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