Change effective on 05 April 2013
A new version of the Heroku CLI is available with support for dyno resizing on a per process-type basis.
Available sizes are 1X (512MB RAM at $0.05/dyno-hour) and 2X (1024MB RAM at $0.10/dyno-hour).
Update your toolbelt and resize the dynos of an existing application:
$ heroku update Updating from 2.36.0... done $ heroku ps:resize web=2X worker=1X Resizing dynos and restarting specified processes... done web dynos now 2X ($0.10/dyno-hour) worker dynos now 1X ($0.05/dyno-hour)