State of the Stack: Who's Using What In Production
Recently, as part of their new RailsLab site, New Relic released The State of the Stack: A Ruby on Rails Benchmarking Report.
Despite the title, I don't think it's a benchmarking report at all, but it does present some useful information collected from the production environments of over 1000 New Relic customers. You can see which versions of Ruby and Rails are the most popular in production amongst New Relic customers, as well as the Rails plugins that are used the most. It's important to remember, of course, that New Relic customers are not necessarily representative of the entire Ruby and Rails community.
Ruby 1.8.6 running on a 64 bit Linux takes 36.1% of the Ruby interpreter market here, with 1.8.6 on a 32 bit Linux taking second place and 1.8.6 on OS X coming in third. 1.8.7 sees very little action, and JRuby's first appearance is with just 0.7% of the market. On the Rails front, there's a similar distribution, with Rails 2.2.2 taking 37%, 2.1.0 with 15.5%, and 2.1.2 with 9.6%. Rails 1.x is still in use by a few percent of users.
Disclaimer: New Relic is a sponsor of Rails Inside. This is not a sponsored post, however.