Best Practices for Drupal Caching and Troubleshooting Performance Issues

Droptica published a blog on best practices for Drupal caching and how to address common caching issues. The post explains how caching improves Drupal site performance by reducing redundant processing and lowering server load. It details Drupal’s built-in caching mechanisms, including page caching, dynamic page caching, entity caching, and render caching, while also covering external solutions like Varnish, Redis, and Memcached. 

The blog highlights key best practices, such as properly using cache tags, cache contexts, and optimizing Twig render caching. It also outlines common caching problems—like stale content and slow load times for authenticated users—and provides troubleshooting steps using Drush commands, performance profiling tools, and debugging techniques. The post concludes with recommendations for maintaining a well-balanced caching strategy to ensure optimal performance, scalability, and user experience.