Chapter 1, Upgrading Drupal, focuses on preparing a Drupal environment for running a high performance Drupal website. We will discuss upgrading Drupal 5.x to Drupal 6.x, creating backups of our site files and databases, running the Drupal Status report, upgrading contributed modules to their latest 6.x versions, and running update.php. We will also tweak our PHP settings using the Drupal settings.php file. Chapter 2, Maintaining your Drupal Site, covers the basics of maintaining your Drupal website including inspecting your Drupal configuration file, checking your MySQL and PHP configurations, enabling and using the Drupal Update Status module, disabling and uninstalling contributed modules, and clearing the Drupal performance cache and theme registry. We'll also look at running cron jobs, tweaking our php.ini file, and tweaking our .htaccess file. Chapter 3, Using Development Modules and Tools, focuses on using Drupal development modules and tools such as the Development module. We will look in detail at the Development module's functionality and use it to monitor performance on our site. Chapter 4, Performance Optimization, focuses on Drupal performance optimization, including throttling modules and blocks through the Development module to generate dummy taxonomy, and content for our site using Views 2.x, and clearing our Views cache. Chapter 5, Using DB Maintenance and Boost, focuses on using the DB Maintenance and the Boost modules. We'll look in detail at a basic configuration of the Boost module to enhance performance for our anonymous site users. Chapter 6, Advanced Boost, focuses on using the Boost module to do advanced performance functionality. We'll look at using the Boost module along with Global Redirect and Transliteration, configuring advanced Boost module caching, configuring Boost crawler, and how to check and tweak our Boost .htaccess settings. Chapter 7, Using Memcache API and Integration, focuses on using the Memcache API and Integration module. We will install a development WAMP environment using MoWeS Portable in this chapter as well as install the Memcached binary libraries, integrate and configure Memcached to work with PHP, and test the module on our development site. Chapter 8, Advanced Caching and Contributed Modules for Caching, focuses on Advanced Drupal caching and using contributed modules for caching on our site. We will discuss using the Cache Router, Authcache, and Advanced Cache modules. Chapter 9, Multisite Configuration and Performance, focuses on Drupal multisite configuration and performance. We will create multisite folders and configure our Drupal settings.php for multisite. We will tweak our httpd.conf file to support multisite, and use caching in a multisite environment.