Forum .LRN Q&A: Re: Server recommend for dotLRN - with 80.000 users-
More importantly, such a horribly awful slowdown (10 s page serve time) with just two concurrent users is pretty strange. That's not some disk IO limit due to e.g. RAID 5 vs. RAID 10 either (not with only 2 concurrent users!), it's got to be something that effects low-end performance too, aka, a mis-configuration problem.
I bet your AOLserver thread settings are wrong, that's probably the easiest single way to make your performance really suck. See my previous post and link above about that.