Hands-On Software Architecture with Golang

Capacity Planning and Sizing

Capacity planning (or sizing) of an environment is the process of determining the number and configurations of various components in an environment, so that the system requirements and business goals are satisfied with the required SLAs. This is not an exact science but rather its rough calculations with input from required SLAs, past design experience, domain knowledge, and applied creative thinking.

For computes, the main resources are CPUs and memory. The domain knowledge and system design indicate how much of these resources are needed for a single request:

• Is the API handling resource intensive? If yes, then more core CPUs might be needed.
• Is the API handling IO bound? If yes, then ancillary hardware like ...