Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/5351#issuecomment-91067327
That is pretty big, but I have tested on problems of that size successfully
(though I used minInstancesPerNode and/or minInfoGain to keep the tree from
being a full tree) and not seen such bad GC issues. Were you using
checkpointing, and does adjusting checkpointing improve performance?
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