ariel-miculas commented on issue #24704:
URL: https://github.com/apache/datafusion/issues/24704#issuecomment-5477588507

   > After many experiment, I found blocked approach is only a better memory 
management approach to reduce the peak memory usage.
   
   It's also relevant for excessive spilling in the downstream operator, as 
described here: 
https://github.com/apache/datafusion/issues/22526#issuecomment-4568611822
   
   Even more relevant for the [partitioning in 
datafusion-comet](https://github.com/apache/datafusion-comet/blob/main/native/shuffle/src/partitioners/multi_partition.rs#L102)
 because threre's a shuffle after the partial aggregation that will always hit 
this spilling issue.


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