Enable WEB_CONCURRENCY to be set to a default value based on dyno size
Change effective on 02 March 2015
If a Ruby application has the configuration variable SENSIBLE_DEFAULTS set, then the configuration variable WEB_CONCURRENCY will be defaulted to a value based on the dyno size.
When enabled the value will default to:
- 1X dynos: WEB_CONCURRENCY=2
- 2X dynos: WEB_CONCURRENCY=4
- PX dynos: WEB_CONCURRENCY=16
If WEB_CONCURRENCY is manually set, this functionality will be disabled.
You must deploy after setting SENSIBLE_DEFAULTS to activate this functionality.
$ heroku config:set SENSIBLE_DEFAULTS=enabled
$ git commit --allow-empty -m "enable sensible defaults"
$ git push heroku master
$ heroku run bash --size 2X
Running `bash` attached to terminal... up, run.7530
~ $ echo $WEB_CONCURRENCY
4