Load Testing and Capacity Planning for WebSockets
Learn how to simulate thousands of concurrent WebSocket connections, measure server limits, and plan capacity so your realtime system scales without surprises.
Why Load Testing Matters
Benchmarking tells you how a single connection behaves, but load testing tells you what happens when thousands of clients connect at once.
- Find the breaking point before users do
- Validate horizontal scaling assumptions
- Size your infrastructure budget accurately
Connections vs Messages
Two independent dimensions stress a realtime server differently:
- Connection count drives memory and file-descriptor usage
- Message throughput drives CPU and network bandwidth
Always test both axes separately and combined.
All lessons in this course
- Benchmarking WebSocket Performance
- Profiling and Debugging Realtime Issues
- Realtime Monitoring and Alerting
- Load Testing and Capacity Planning for WebSockets