On Heroku, I have written a very small autoscaling script that is called once every few minutes by Heroku Scheduler (like a cronjob). The autoscaling script pul

On Heroku, I have written a very small autoscaling script that is called once every few minutes by Heroku Scheduler (like a cronjob). The autoscaling script pulls the custom metric, does some arithmetic, and calls the Heroku API to scale the dyno count up/down as desired. (That script was probably shorter and more readable than this comment.)