- Heroku Architecture
Databases & Data Management
- Heroku Postgres
- Heroku Enterprise
- Extending Heroku
Puma is Now the Recommended Ruby Webserver
Change effective on 23 January 2015
Heroku now recommends using the Puma webserver. The previously recommended webserver, Unicorn, is susceptible to slow client attacks. If you are using Unicorn on Heroku please migrate to Puma. For more information read Deploying Rails Applications with the Puma Web Server.