Github user nishkamravi2 commented on the pull request:
https://github.com/apache/spark/pull/1391#issuecomment-49348179
Bringing the discussion back online. Thanks for all the input so far.
Ran a few experiments yday and today. Number of executors (which was the
other main handle we wanted to factor in) doesn't seem to have any noticeable
impact. Tried a few other parameters such as num_partitions,
default_parallelism but nothing sticks. Confirmed the proportionality with
container size. Have also been trying to tune the multiplier to minimize
potential waste and I think 6% (as opposed to 7% as we currently have) is the
lowest we should go. Modifying the PR accordingly.
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