Scaling Node.js Applications

After years of running Node.js in production, here's what we've learned.

Key Principles

1. Stateless Services: Keep your services stateless so you can scale horizontally.

2. Caching: Use Redis or similar for session storage and caching.

3. Connection Pooling: Database connections are expensive. Pool them.

4. Async Everything: Node.js shines when you embrace its async nature.

Common Pitfalls

• Blocking the event loop
• Not handling errors properly
• Ignoring memory leaks
• Poor logging practices