How many microservices were in the cluster and how many can you keep in your head?

The number of microservices in a cluster can vary greatly — from a few dozen to hundreds, depending on the scale of the project and architecture.

When it comes to keeping track mentally, it is usually convenient to operate with 5-10 services, well understanding their responsibilities and interactions. For larger numbers, it is important to use documentation, diagrams, and monitoring tools to avoid getting lost in details.

In real projects, it is common to apply domain and team separation so that each specialist focuses on a limited set of microservices.