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I have experience running an application with 9M users (around 2M active) on Heroku. We had around 1,5k requests/second average, peaking at over 2k reqs/sec. No

I have experience running an application with 9M users (around 2M active) on Heroku. We had around 1,5k requests/second average, peaking at over 2k reqs/sec. No major issues, although we were starting to hit the per-app dyno limit (we could not go over 20 dynos) but this problem could be solved by creating a second app. Overall no issues and I would definitely recommend them.

gitgud 8y ago
That's amazing! What does that cost per month? (if I may ask) Only 20 dynos? I assumed Heroku could scale to hundreds of dynos per app deployment, as they assign a random local port to every dyno. You could create a second app, but in certain cases, that violates their terms of service, where you're not allowed to use many deployments to act as a single webapp.
- Rjevski 8y ago
  > What does that cost per month? (if I may ask) I don't actually remember but I did the test on my own Heroku apps now and with Performance-M dynos (the ones we were using) we were looking at $5000+/month. To be fair the most expensive things were the add-ons; we were spending over $10000/month for those.
ian0 8y ago
Cheers - thats very comforting.