WordPress performance tuning
Arne Brachhold as a nice round-up on tuning your (self-hosted) WordPress-blog, mainly by tweaking caching on mysql-, php- & application-levels. nothing ground-breaking, but a good check-list for sure. since Arne isn’t too specific about mysql-tuning, I’ld like to recommend (for dedicated servers with lots of memory, >256mb) setting higher values for mysql-parameters query_cache_size, table_cache & key_buffer_size to keep those blogs rolling in times of high traffic (here’s a useful summary on basic mysql-tuning).
Missing 1 little piece though, you should encourage people to also implement a server-side caching scheme to send out the correct caching headers with static content such as images, javascript, css, pdfs, favicon.ico, etc..
Read about it: htaccess Caching
You will also like reading about the 14 Top Methods for faster, speedier sites
[...] Wordpress Performance tuning [...]
Outsourcing static content delivery (JS, style sheets, images, pdf’s, podcasts etc) to content delivery networks also helps a lot - lowers CPU and memory usage on your server and you will be able to serve more web visitors with the same hardware.
Disable compiled modules in Apache that are not needed for your project. This will lower cpu and memory requirements.