Capacity Planning Infrastructure for Web Applications

At DrupalCon Amsterdam 2019 I presented a session about capacity planning. In this session I explain how to solve a couple of recurring problems:
Site Launch and User expectations

Based on these problems I share some good practice, by answering questions, like:

- How to create a good capacity plan?
- How to forecast resource needs and make it sustainable?
- How to automate that process?

Imagine a customer that provides a set of needs for hardware, sets a date and launches the site, but then he forgets to warn that they have sent out some (thousands of) emails to half the world announcing...