Please stop me-tooing into every thread - it's rather counterproductive. <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />
RaQs provide poor I/O performance, regardless of the model or configuration (their >$4000 system with a RAID is a complete joke...). mod_perl will not help that in the least... In fact, if anything, it will make the problem WORSE by consuming memory. We do not advise running the UBB on RaQs, unless it's going to be a somewhat small / infrequently used board.
If a board has grown large enough to warrant a dedicated server, going with an indigo pizza box w/ slow IDE drives is nothing short of suicide. A genuine, real server is required. <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />