Does anyone know how copy-on-write forking plays into the 512MB limit on Heroku? If your app takes up 256MB, does that mean you can only fit 2 workers? Shouldn

Does anyone know how copy-on-write forking plays into the 512MB limit on Heroku? If your app takes up 256MB, does that mean you can only fit 2 workers? Shouldn't there be some savings due to copy-on-write?