NGINX vs Apache

Both NGINX and Apache HTTP Server are the most popular web servers used to deliver websites and web applications to users.

Server	First Released	Developed By
Apache	1995	Apache Software Foundation
NGINX	2004	Igor Sysoev

Despite serving the same purpose, their internal architecture and performance characteristics are very different.

Architecture (Key Difference)

Apache Architecture (Process-Based)

Apache uses:

• One process or thread per request
• Different Multi-Processing Modules (MPMs)

Common Apache MPMs:

• Prefork – One process per request (high memory usage)
• Worker – Multi-threaded
• Event – Improved concurrency

🔴 Problem: High traffic = many processes = high memory consumption

NGINX Architecture (Event-Driven)

NGINX uses:

• Single master process
• Few worker processes
• Asynchronous, non-blocking I/O

🟢 Benefit: One worker can handle thousands of concurrent connections

Architecture Comparison

Feature	Apache	NGINX
Request handling	Process/Thread	Event-driven
Concurrency	Limited	Very high
Memory usage	High	Low

Performance Comparison

Static Content (HTML, CSS, Images)

• NGINX is much faster
• Apache serves static files well, but uses more memory

Dynamic Content (PHP, Python)

• Apache can process dynamic content directly
• NGINX passes dynamic requests to external processors (PHP-FPM)

Serving a Static Website

Apache Configuration Example

<VirtualHost *:80>
    ServerName example.com
    DocumentRoot /var/www/html
</VirtualHost>

NGINX Configuration Example

server {
    listen 80;
    server_name example.com;
    root /var/www/html;
}

• Both configurations serve static files
• NGINX uses fewer resources
• Apache is easier for beginners

Handling Dynamic Content (PHP)

Apache (Direct PHP Processing)

<FilesMatch \.php$>
    SetHandler application/x-httpd-php
</FilesMatch>

✔ Apache can process PHP internally
❌ Higher memory usage

NGINX (Via PHP-FPM)

location ~ \.php$ {
    fastcgi_pass unix:/run/php/php-fpm.sock;
    include fastcgi_params;
}

✔ Better performance
✔ More scalable
❌ Slightly more complex setup

Configuration Style

Apache (.htaccess Based)

• Supports .htaccess
• Changes apply without restart
• Useful for shared hosting

RewriteEngine On
RewriteRule ^old$ new [R=301,L]

NGINX (Centralized Configuration)

• No .htaccess
• Configuration in one place
• Faster and more secure

rewrite ^/old$ /new permanent;

Configuration Comparison

Feature	Apache	NGINX
.htaccess	Yes	No
Reload required	No	Yes
Performance	Slower	Faster

Security Comparison

Feature	Apache	NGINX
Attack surface	Larger	Smaller
DDoS handling	Moderate	Better
SSL handling	Good	Excellent

NGINX handles SSL/TLS termination more efficiently.