Heroku Changelog New performance dyno size for large scale apps

Change effective on 03 February 2014

A new dyno size, PX, is available. These performance dynos have 12 times the memory of a 1X dyno, significantly more compute resources and a high degree of isolation for faster and more consistent performance.

See the Dyno Size documentation to learn more about the different dyno sizes. See Optimizing Dyno Usage to learn more about how to take advantage of different dyno sizes.

The Heroku Toolbelt v3.3.0 was released to support this new feature.