We checked the other day a normal high load of over 600 queries per second.
that's from the web masters mouth himself on the load..
i'm searching for the amount of posts per day or so..
but anyway, the website is www.hardocp.com
and the forums are www.hardforum.com
hardware forum, mostly. and i'm not the maintainer, just trying to help out the web master.
are you sure its MySQL thats breaking?
under REALLY high stress, the forums will give out, and all new posts won't be counted in postcount, and threads aren't bumped, and if you start a new thread, the number of posts in it stays at 0 until the damn thing is fixed..