Github user nishkamravi2 commented on the pull request:
https://github.com/apache/spark/pull/1391#issuecomment-48835500
Yes, I'm aware of the discussion on this issue in the past. Experiments
confirm that overhead is a function of executor memory. Why and how can be
figured out with due diligence and analysis. It may be a function of other
parameters and the function may be fairly complex. However, the proportionality
is undeniable. Besides, we are only adjusting the default value and making it a
bit more resilient. The memory_overhead parameter can still be configured by
the developer separately. The constant additive factor makes little sense
(empirically).
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