Heroku horizontal vs vertical scaling and 1x vs 2x dynos
A Standard 1x dyno on Heroku allows for 512MB of RAM. A Standard 2x dyno on Heroku allows for 1GB. Upgrading from a 1x dyno to a 2x dyno is referred to as vertical scaling, while adding more 1x dynos instead is referred to as horizontal scaling.
I believe horizontal scaling allows my app to service more http requests, but I'm not so sure what vertical scaling does.
Another thing that I don't think is too clear about Heroku: Does having 2 1x dynos still only provide 512MB of RAM total (instead of 512MB + 512MB)? If that is the case, how much RAM does my app have with 1 1x dyno and 1 2x dyno?
And after upgrading/downgrading the amount of dynos on Heroku's website, is there anything else that has to be done through the terminal to get them working?
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