Кешируй и не думай

Как занедорого поднять нагрузочную способность сайта на стеке LAMP

In a first step I will show how to make your site faster by enabling Boost on a normal LAMP stack (Apache2, PHP, MySQL), and in a second step I explain how to make your site even faster by using nginx as a reverse proxy sitting in front of Apache and delivering the static HTML pages cached by Boost. nginx delivers static files a lot of faster than Apache and uses less memory/CPU.

I do not issue any guarantee that this will work for you!

howtoforge.com/how-to-speed-up-drupal-7.7-with-boost-and-nginx-debian-squeeze

hdrupal.org/project/boost

nginx.org

Рецепт, к сожалению, заточен под Друпал.