warrenzhu25 opened a new pull request #30370:
URL: https://github.com/apache/spark/pull/30370


   ### What changes were proposed in this pull request?
   Add config spark.executor.coresOverhead
   
   ### Why are the changes needed?
   This can handle mismatch of memory per core ratio between executor and 
underlying physical machines or vm. 
   
   ### Does this PR introduce _any_ user-facing change?
   Yes.
   
   ### How was this patch tested?
   Covered in UT.
   


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