Getting RPM working with Rails 3.0
Note: This has only been tested to work with Heroku, my hosting service of choice. It's not been tested anywhere else. Regardless, you should still test everything yourself.
RPM is a fantastic tool for seeing how your Rails application performs in production, and to be honest, having run some production apps without it, you are completely blind if it's not set up.
However, the arrival of Rails 3.0 has brought some far reaching changes to the way the framework works, rendering the RPM gem useless with Rails 3.0. However, NewRelic have a newly released version (2.13.0.beta5) which works with Rails 3, and I have running in a couple of production environments.
So how do you get it up and running?
Well Rails 3 means bundler, so first step is to include the following in your Gemfile:
One this is done, create config/initializers/newrelic.rb and simply include:
Deploy the code when you're ready, and then flip on the New Relic add-on at Heroku. Hopefully, your apps still running, but now with added RPM goodness.
