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Cheepnis is a small library that makes it easy for Heroku-based applications to spin up worker processes when needed, and shuts them down when they are finished. Rationale: Keeping a worker going continuously costs around $36/month at the current rates. This is reasonable for commercial applications but for hobbyist and free sites it is quite expensive. If all you are doing is sending mail a few times a day, this would keep the cost down to the $1-5 range. Install: Assuming you are already running your app on Heroku: Put cheepnis.rb in your applications lib/ directory. Use the Heroku gem by adding this to your config/environment.rb file config.gem 'heroku' Set the Heroku config variables so your app can modify its own settings: heroku config:add HEROKU_USERfirstname.lastname@example.org' heroku config:add HEROKU_PASSWORD='yourpassword' Use the credentials that you use to log into the Heroku website. Use: Call Cheepnis.enqueue(obj) in place of Delayed::Job.enqueue(obj) Reference: http://docs.heroku.com/delayed-job Caveats: It's within the realm of possibility that something could go wrong with the machinery that shuts the worker down after all jobs are processed; which could result in more charges to your account. It's also possible that the Heroku people may take a dim view of this kind of usage, although it's not doing anything except using their API. Personally I think they should make it easier/cheaper to do this kind of thing for low-volume applications, but it's their business.