I believe it's not a webserver problem. While mediawiki is refusing to serve pages, I can hit other PHP pages on the same webserver with no delays. (See original email at http://lists.wikimedia.org/pipermail/mediawiki-l/2008-August/028302.html.)
DanB
-----Original Message----- From: Daniel Friesen Sent: Tuesday, September 02, 2008 1:17 PM To: mediawiki-l@lists.wikimedia.org Subject: Re: [Mediawiki-l] Extensions and threading - how to bring your wiki to a halt
Perhaps we should begin to look at this at a webserver level. Perhaps the webserver is blocking and can only handle one request at a time. Try testing this on a variety of webservers. Apache, lighttpd, nginx... I think Apache used worker processes, and I know that nginx does. So it may be a good idea to debug this on different numbers of worker processes.
~Daniel Friesen