HyukjinKwon opened a new pull request, #50131:
URL: https://github.com/apache/spark/pull/50131

   ### What changes were proposed in this pull request?
   
   This PR is a followup of https://github.com/apache/spark/pull/50080 that 
changes default value from 256MB to 16MB
   
   ### Why are the changes needed?
   
   The default rows of the Arrow batch is 10K. 256MB is too large to roughly 
match the size estimation. 
   
   ### Does this PR introduce _any_ user-facing change?
   
   No, the main change has not been released out yet.
   
   ### How was this patch tested?
   
   Manually.
   
   ### Was this patch authored or co-authored using generative AI tooling?
   
   No.


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