1. The document provides installation steps for Nginx 0.9.x, PHP 5.3.4, and related components on a Linux server using the yum package manager and compiling from source code.
2. It involves installing dependencies, compiling and configuring MySQL, PHP, and extensions like memcache and imagick.
3. The PHP configuration is optimized for performance using eAccelerator caching and the Zend Guard Loader. Nginx, PHP-FPM, and MySQL systemd service scripts are also configured.