Dedicated servers give multiplayer games fair, authoritative matches, but running thousands of them for a large player base brings its own limits. Most of these limits do not show up in a test environment or a closed beta. They appear at launch, during a big event or on patch day, when the fleet is under the most pressure.
These are ten we see large studios run into most often, with what to do about each.
A cloud region has a finite amount of the instance type you want, and other customers are competing for it. During a big launch, a single region can stop giving you new machines when you need them most. Spreading capacity across several providers and bare metal in each region gives you somewhere else to go.
From requesting a machine to having a game server ready for players can take minutes once you include booting the instance, downloading the build and loading the map. At launch, those minutes become queues. Keep a buffer of warm, ready servers and cache builds close to where they will run.
Autoscalers that wait for CPU or player counts to rise before adding capacity are always a step behind a sharp spike. Scaling rules for game servers work better when they look ahead, using scheduled events, matchmaking queue length and the rate of new logins.
Even with enough servers, the system that hands a free server to each new match has its own throughput limit. When thousands of matches start in the same minute, allocation can become the bottleneck. Test allocation rate directly, separate from raw capacity.
The matchmaker and the server fleet often belong to different systems or different teams. Under load, timeouts and retries between them can create duplicate allocations, empty servers or players stuck waiting. Load test the two together, with realistic failure cases.
A game server that ran several matches per machine in testing may manage fewer in production once real players, real maps and full tick rates are involved. Measure CPU and memory per match under realistic conditions before you size the fleet, and review it after each major update.
Game servers send a steady stream of data to every player. On public cloud, outbound data is charged by volume, and at scale those charges can rival the cost of the machines themselves. Include egress in your cost model, and compare it across providers and bare metal.
If all your servers run on one provider, an outage at that provider takes your game with it. Running across more than one provider, with orchestration that can move new matches elsewhere, keeps the game available when one of them has a bad day.
Rolling a new build out across thousands of servers while matches are in progress is a large operation. Old and new versions have to run side by side until existing matches finish, and a bad build needs a quick way back. Practice rollouts and rollbacks before you need them.
Popular games, and competitive games in particular, attract denial-of-service attacks against game servers. Protection needs to be in place in every region you host in and tuned for game traffic, which behaves differently from web traffic.
Each of these limits is manageable when it is planned for. The common thread is that a large game needs hosting spread across providers and regions, scaling that looks ahead, and people who know the fleet well enough to act quickly when something changes. For a wider view of launch planning, see our guide on how to scale game server hosting for a global launch.
Multiplay runs dedicated game servers on a hybrid of bare metal and multiple clouds in more than 40 regions, with orchestration that allocates servers across them. We have hosted more than 600 games, and our engineers support them around the clock, through launches, events and patch days. Studios that want more help can add our live operations service for observability, runbooks and incident response.
The most common limits are regional capacity, server start-up time, slow autoscaling and allocation throughput. Each one can create queues even when the overall fleet looks large enough.
Keep a buffer of warm servers ready for players, cache game builds close to where they run, and keep map loading as light as possible.
Multiple providers give you more capacity in each region, a fallback when one provider has an outage, and more options to manage cost.