Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/4051#issuecomment-72530870
Alright, in summary, the proposal here is to default the min to 0 and the
max to Int.Max, and add a new `initialExecutors` config that defaults to the
min. On second thought I think the max sounds reasonable because the number
executors we get is actually limited by the number of pending tasks we get (so
it'll never actually ramp up all the way). As for the min, if we do decide to
set it to 0 then perhaps we should lower the ramp up interval, though we can do
that separately. I just thought the advantage of keeping it at 1 is that we'll
always make progress no matter how slowly we ramp it up, though it's not a big
enough issue to block this patch.
I'm merging this into master. Thanks for the input everyone.
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