rluvaton commented on PR #17029:
URL: https://github.com/apache/datafusion/pull/17029#issuecomment-3151658912

   Note: sort spill remaining in memory batch while row_hash does not, also 
sort account for memory used by the SortPerservingMergeStream which row_hash 
does not.
   
   How much is the difference?
   The kernels that are used in the sort stream might over estimate and also 
note that even if you request X capacity you might get more than that.


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