Your AOLserver config settings look kind of crappy. First of all,
your 120 s threadtimeout is much too low. Secondly, why do you have
max and minthreads both set to only 5 ? Are you
sure that
your site isn't hanging simply because you have 6 clients trying to
load a page at once?
I'm not sure what maxconnections should be set to, but I simply never
set it at all. Looks like it defaults to 100 (at least in AOLserver
4.0.x).
What is different about this problem site vs. your other OpenACS
sites?