Enterprise WordPress Scaling

Scaling WordPress requires moving beyond a single-server architecture. This guide explores caching layers and database optimization.

Architecture Overview

For high-traffic sites (100k+ monthly visits), we recommend:

1. **Load Balancer**: Distributes traffic.

2. **App Servers**: Stateless WordPress instances.

3. **Database Cluster**: Master-Slave MySQL/MariaDB.

4. **Redis**: Object caching.

Redis Object Cache Setup

Redis stores database query results in memory, drastically reducing SQL load.

Installation

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

WordPress Configuration

Install the "Redis Object Cache" plugin in WordPress. Add the following to your `wp-config.php`:

define('WP_REDIS_HOST', '127.0.0.1');
define('WP_REDIS_PORT', 6379);
define('WP_CACHE', true);

Database Optimization

Use WP-CLI to optimize tables regularly.

wp db optimize

Ensure you are using InnoDB engine for all tables to prevent table locking issues commonly found with MyISAM.