What is the maximum number of containers that operated simultaneously during peak loads?

The maximum number of containers operating simultaneously during peak loads depends on the infrastructure and system configuration. For example, in Kubernetes, you can horizontally scale pods (containers) to hundreds or thousands of instances if the cluster and resources permit. In real projects, the number of containers can range from a few dozen to several hundred or more, depending on the load and architecture of the application. To provide an exact answer, the specific case and orchestrator settings need to be known.