Github user sryza commented on the pull request: https://github.com/apache/spark/pull/3913#issuecomment-68936032 Ooh OK I'll update the doc. That's still a little cumbersome though for someone who just wants to see how much space an object takes up. Most of the recommendations on that page are at the micro level - tuning the memory taken up by a single object. It would be useful to have a way to determine this amount directly. E.g. if I have plan to have an RDD of some case class I might want to see how much space each instance takes up. Then I can experiment quickly with things like flatter structures or removing fields and see if they improve the footprint. Another thing is that users trying to tune applications commonly need to figure out whether they should broadcast side-data or figure out a way to load it as an RDD and join. It would be helpful to be able to have a single function call that's easy to use from the shell to find out the size of the data you're about to broadcast.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org