Note: these haven't been vetted yet
- https://github.com/mattetti/GC-stats-middleware
- https://github.com/bhb/rack-perftools_profiler
- https://github.com/37signals/trashed (requires statsd)
- https://github.com/cheald/scrap (rails metal)
- https://github.com/fauna/bleak_house (requires custom ruby build and/or ruby 1.8.7, not as usable for request cycle)
- https://github.com/noahd1/oink
- http://www.coffeepowered.net/2009/06/13/fine-tuning-your-garbage-collector/
- http://www.slideshare.net/angrybeaverdag/use-ruby-gc-in-full
- http://www.slideshare.net/dimelo_RD/rails-performance-ruby-gc-tweaking
- http://pivotallabs.com/users/scoward/blog/articles/1411-identify-memory-abusing-partials-with-gc-stats (rack-bug)
- http://www.rubyenterpriseedition.com/documentation.html#_garbage_collector_and_object_space
- http://blog.evanweaver.com/2009/04/09/ruby-gc-tuning/
- http://blog.evanweaver.com/2008/02/05/valgrind-and-ruby/
- http://engineering.gomiso.com/2011/02/25/adventures-in-scaling-part-1-using-ree/
- http://smartic.us/2010/10/27/tune-your-ruby-enterprise-edition-garbage-collection-settings-to-run-tests-faster/
- http://thefjord.org/2010/07/05/ruby-garbage-collector-tuning-a-walkthrough/