ruby gc tuningI’d like to call out something important from my QCon slides: the Railsbench GC settings. quick study In my experience, a typical production Rails app on Ruby 1.8 can recover 20% to 40% of user CPU by applying Stefan Kaes’s Railsbench GC patch to the Ruby binary, and using the following environment variables: RUBY_HEAP_MIN_SLOTS=500000 RUBY_HEAP_SLOTS_INCREMENT=250000 RUBY_HEAP_SLOTS_GROWTH_FACTOR
