Ruby 1.8 uses green threads, so running multiple processes lets you use all your cores. As mentioned in another post, Rails used to not be thread safe. Right n

Ruby 1.8 uses green threads, so running multiple processes lets you use all your cores. As mentioned in another post, Rails used to not be thread safe. Right now I'm running a Rails site in production with multithreading enabled, but I'm sure many libraries in Ruby are not thread safe.