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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/06/07 15:24:39 UTC

[GitHub] [spark] manuzhang commented on pull request #28669: [SPARK-31864][SQL] Adjust AQE skew join trigger condition

manuzhang commented on pull request #28669:
URL: https://github.com/apache/spark/pull/28669#issuecomment-640235282


   @cloud-fan @maryannxue @JkSelf I'm seeing a case where partitions [0,0,0,...,13GB] were coalesced to [13GB]  and took 17 min for a SortMergeJoin. With coalescing disabled, partitions would be split into [0,0,0,..., 256MB, 256MB,...,256MB] by OptimizeSkewedJoin and only took 38s. WDYT ?


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