A guide to using Puma on Heroku. Puma uses threads, in addition to worker processes, to make more use of a systems available CPU.| devcenter.heroku.com
Configuring Rails applications to use the Unicorn web server, enabling the concurrent processing of requests.| devcenter.heroku.com
Are you seeing ActiveRecord::ConnectionTimeoutErrors in your Rails app? You probably need a bigger connection pool (and here's why).| tekin.co.uk