Why Microservices May Not Be Suitable for Real-Time Game Servers

A senior architect recently interviewed a large game company and asked about their plans for microservice architecture. The interviewee was surprised, having never heard of microservices, and the architect explained benefits such as easier testing, maintenance, scalability, and language independence.

The game developer responded that real‑time game servers require ultra‑low latency, making microservices unsuitable; instead, modular development within a single process is preferred.

Several experts contributed their views:

Microservices increase network overhead and add complexity (service mesh, gateways, sidecars), which can hurt performance.

Typical microservice request/response patterns lack streaming capabilities needed for real‑time game events.

Game sessions often need sticky routing and long‑lived in‑memory state, conflicting with the stateless nature of microservices.

State persistence and rapid event handling in games make remote RPC calls undesirable due to added latency.

Overall, while microservices are valuable for large, CRUD‑heavy web applications, they are generally a poor fit for latency‑sensitive, stateful game server architectures unless the team can handle the added complexity and performance trade‑offs.