Hi -
The free public beta for memprof.com is now live. You can sign up and
use it
here: http://memprof.com/signup
The gem is free and open source, available on github:
GitHub - ice799/memprof: A Ruby gem for memory profiling and supports OSX and linux.
To get more information about how the rubygem works, please check out
these
blog posts:
http://timetobleed.com/descent-into-darkness-understanding-your-systems-binary-interface-is-the-only-way-out/
http://timetobleed.com/memprof-a-ruby-level-memory-profiler/
http://timetobleed.com/rewrite-your-ruby-vm-at-runtime-to-hot-patch-useful-features/
http://timetobleed.com/hot-patching-inlined-functions-with-x86_64-asm-metaprogramming/
http://timetobleed.com/string-together-global-offset-tables-to-build-a-ruby-memory-profiler/
Enjoy!