Howdy, I have been trying to understand the inner workings of Apache, and developed two DTrace profiler scripts to help. These are available on my website: http://daemons.net/~matty/code/apache.html And will help answer questions like "What is causing Apache to eat excessive amounts of CPU?" or "what is the CPU overhead associated with mod_cgi?" or "what would be the benefit of removing 12 modules from the LoadModules section in httpd.conf" or "how much time does it take Apache to process a connection?" or "What is the code path taken by mod_ssl?" This script does not require mod_dtrace, and I would love to get feedback, comments and suggestions :) Hope folks find this useful. Thanks, - Ryan -- UNIX Administrator http://daemons.net/~matty