Optimization

Tuning the Apache MaxClients parameter | 2BITS.com - Drupal Development, Customization and Consulting

http://2bits.com/articles/tuning-the-apache-maxclients-parameter.html

Tuning LAMP systems, Part 2: Optimizing Apache and PHP

http://www.ibm.com/developerworks/linux/library/l-tune-lamp-2.html?ca=dgr-lnxw01LAMPTuningP2