Nginx
Definition
A high-performance web server known for handling many simultaneous connections efficiently. Powers many high-traffic websites.
What is Nginx?
Nginx (pronounced "engine-x") is a web server designed for high performance and efficiency. Created in 2004 to handle the "C10K problem" – serving 10,000 simultaneous connections – it's now the most popular web server worldwide.
Netflix, Airbnb, Dropbox, and many other high-traffic sites rely on Nginx.
Why Nginx Is Popular
Performance
Nginx handles concurrent connections more efficiently than traditional servers. It uses an event-driven architecture rather than spawning new processes for each request.
Resource Efficiency
Uses less memory and CPU than Apache under load. This means lower hosting costs and better performance.
Reverse Proxy
Often sits in front of application servers, handling static files and SSL while passing dynamic requests to Node.js, Python, or PHP backends.
Load Balancing
Distributes traffic across multiple servers, essential for high-availability setups.
Nginx vs Apache
| Factor | Nginx | Apache |
|---|---|---|
| Performance | Excellent | Good |
| Resource usage | Lower | Higher |
| Configuration | Centralised | Per-directory (.htaccess) |
| Static files | Very fast | Fast |
| Dynamic content | Passes to backend | Built-in PHP |
| Learning curve | Steeper | Gentler |
Common Nginx Uses
Web Server
Serving static files (HTML, CSS, JavaScript, images) directly.
Reverse Proxy
Sitting in front of application servers, handling SSL and caching.
Load Balancer
Distributing requests across multiple application servers.
CDN Origin
Many CDNs use Nginx at their edge servers.
For Website Owners
You might use Nginx if you have:
- VPS or cloud hosting
- High-traffic websites
- Node.js or Python applications
- Modern managed hosting (like Kinsta, Cloudways)
Nginx configuration requires server access – it doesn't use .htaccess files like Apache. Your hosting provider usually handles the setup.