Here is a gist by Sokolov Yura (funny-falcon) that allows you to GC tune Ruby 1.9.2 just like Ruby Enterprise Edition (REE). So all of us using RVM have no reason not start using this right away. Here are the steps. $ curl https://gist.github.com/raw/856296/patch-1.9.2-gc.patch > ~/192-gc.patch $ rvm uninstall 1.9.2 $ rvm install 1.9.2 --patch ~/192-gc.patch I have used this RVM hook below for awh