Where did the 5k RPS come from?

The number 5k RPS (requests per second) is usually derived from system performance requirements or from analysis of real traffic. It can be a target load that the system should handle, or an average/peak value measured in production. For example, if a service handles 5000 requests per second, it means it should be optimized for such a load to prevent delays and errors. It is important to understand the source of this number: customer requirements, monitoring data, or load testing results.