There's no surefire formula for calculating the resources you'll need for a given application. The best, most reliable way to determine what level of service you'll need is to simulate load on your app. Blitz lets you test app load quickly, easily and for free.
To start testing, all you need is a URL. Our globally-distributed Blitz engines will immediately start generating real HTTP traffic. As the test runs, we'll measure the performance as perceived by your users.
We're also big fans of automation, and we know you are too. Try the Blitz plugin for open source Jenkins, which makes it easy to integrate load testing into your existing continuous integration jobs.
Need support? Start a discussion on http://support.blitz.io/.