Pro Drupal Development, Second Edition

CHAPTER 22Optimizing Drupal

Drupal's core architecture is lean and written for flexibility. However, the flexibility comes at a price. As the number of modules increases, the complexity of serving a request increases. That means the server has to work harder, and strategies must be implemented to keep Drupal's legendary snappiness while a site increases in popularity. Properly configured, Drupal can easily survive a Slashdotting. In this chapter, we'll talk about both performance and scalability. Performance is how quickly your site responds to a request. Scalability has to do with how many simultaneous requests your system can handle and is usually measured in requests per second.

Finding the Bottleneck

If your web site is not performing as ...