In this chapter, you have rounded out your knowledge of developing web apps. You learned how to work with Google Tag Manager and Google Analytics to capture page views of your Angular application. Using high-level metrics, we went over how you can calculate the cost of your infrastructure per user. We then investigated the nuances of the effect high-availability and scaling can have on your budget. We covered load testing complex user workflows to estimate how many users any given server can host concurrently. Using this information, we calculated a target server utilization to fine-tune your scaling settings.

All of our pre-release calculations were mostly estimates and educated guesses. We went over the kinds of metrics and custom events you can use to measure the actual use of your application. When your application goes live and you start gathering these metrics, you...