zhengruifeng commented on PR #40100:
URL: https://github.com/apache/spark/pull/40100#issuecomment-1437975144

   I'm not sure whether we can use `child.maxRowsPerPartition` in a global 
sort, for example, the partition sizes maybe [5, 5, 5] in child, but after 
global sort the distribution maybe [3, 3, 3, 3, 3]
   
   cc @cloud-fan 


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