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'''Optimizing website performance with dedicated servers''' goes beyond simply upgrading hardware. Proper software configuration of your web server, caching layers, and database can deliver dramatic speed improvements on any [[Choosing the Right Dedicated Server|dedicated server]].

== Web Server Optimization ==

=== Nginx Tuning ===

Nginx is the most popular high-performance web server. Key optimizations in <code>/etc/nginx/nginx.conf</code>:

worker_processes auto; # match CPU cores
worker_connections 4096; # increase from default 1024

# Enable sendfile and TCP optimizations
sendfile on;
tcp_nopush on;
tcp_nodelay on;

# Keepalive settings
keepalive_timeout 30;
keepalive_requests 1000;

# Gzip compression
gzip on;
gzip_comp_level 5;
gzip_min_length 256;
gzip_types text/plain text/css application/json
application/javascript text/xml application/xml
image/svg+xml;

=== Static File Caching ===

Add browser caching headers for static assets:

location ~* \.(jpg|jpeg|png|gif|ico|css|js|woff2)$ {
expires 30d;
add_header Cache-Control "public, immutable";
}

== Caching Strategies ==

=== Page Caching ===

For dynamic sites (WordPress, PHP applications), use FastCGI caching:

fastcgi_cache_path /var/cache/nginx levels=1:2
keys_zone=PAGECACHE:100m max_size=2g inactive=60m;

This stores rendered pages in memory/disk, eliminating PHP processing for repeat visitors.

=== Object Caching with Redis ===

Redis caches database query results and application objects in memory:

sudo apt install redis-server
sudo systemctl enable --now redis

Typical impact: 50–80% reduction in database queries.

=== Varnish HTTP Cache ===

Varnish sits in front of your web server and caches entire HTTP responses:

* Handles thousands of requests per second from cache
* Sub-millisecond response times for cached content
* Configurable caching rules via VCL (Varnish Configuration Language)

== CDN Integration ==

A Content Delivery Network caches your content at edge servers worldwide:

* '''Cloudflare''' — free tier available, DDoS protection included
* '''BunnyCDN''' — affordable, excellent performance
* '''Fastly''' — premium, highly configurable

CDN benefits:

* Reduced latency for global visitors
* 60–90% reduction in origin server bandwidth
* Built-in DDoS protection
* Automatic HTTPS

== Database Optimization ==

=== MySQL/MariaDB Tuning ===

Key settings in <code>/etc/mysql/mysql.conf.d/mysqld.cnf</code>:

# InnoDB buffer pool — set to 70-80% of available RAM for DB servers
innodb_buffer_pool_size = 4G

# Query cache (MariaDB)
query_cache_type = 1
query_cache_size = 128M

# Connection limits
max_connections = 200

# Temporary tables
tmp_table_size = 256M
max_heap_table_size = 256M

=== Query Optimization ===

* Add proper indexes to frequently queried columns
* Use <code>EXPLAIN</code> to analyze slow queries
* Enable the slow query log: <code>slow_query_log = 1</code>
* Optimize tables periodically: <code>mysqlcheck -o --all-databases</code>

=== PostgreSQL Tuning ===

Key settings in <code>postgresql.conf</code>:

shared_buffers = 4GB # 25% of RAM
effective_cache_size = 12GB # 75% of RAM
work_mem = 64MB
maintenance_work_mem = 1GB

== PHP Optimization ==

If running PHP applications:

* Use '''PHP-FPM''' with appropriate pool sizing
* Enable '''OPcache''' for bytecode caching
* Set <code>opcache.memory_consumption=256</code>
* Use PHP 8.x for significant performance improvements over PHP 7.x

== Monitoring Performance ==

Track improvements with:

* '''Google PageSpeed Insights''' — measures real user experience
* '''GTmetrix''' — detailed waterfall analysis
* '''Server-side:''' monitor with <code>htop</code>, <code>iotop</code>, and custom Grafana dashboards

== See Also ==

* [[Choosing the Right Dedicated Server]]
* [[Building a Scalable Cloud Infrastructure]]
* [[Linux Server Administration Guide]]

[[Category:Web Hosting]]

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