DocColress, Robkelk, Looney Toons, Vorticity, GethN7, whoever that would read this: I see you use RandomSelection on this page. RandomSelection prevents this page from being cached at all, and if I didn't hack RandomSelection to comment the $parser->disableCache(); cache line, it would take ages to load the main page (and send a lot of traffic to the backend layer that could have been served by our cache layer, thus lowering the MediaWiki server load).
I know it might be preferred to just have a random article, but can you please revise your system? For example, look at this. Anything that allows me to deprecate RandomSelection (server-side hacks are annoying, and my hacks are not going to be merged upstream, never.) works for me.