Re: Resource Limit Hit
Have you noticed any unusual user-agents in your analytics? There are an awful lot of potential HTTP requests on your page, and if a non-caching bit of code tries to make all of those requests, it may be pushing you over the limit even though each request requires next to no resources to fulfill. (A standard browser will look at each additional request for the same resource and say "I've already got that".) If there's a badly-coded bot hammering your site, you may have to start blocking IPs to get things back under control.
“Beware of bugs in the above code; I have only proved it correct, not tried it.” --Donald Knuth
"It was as if its architects were given a perfectly good hammer and gleefully replied, 'neat! With this hammer, we can build a tool that can pound in nails.'" -- Alex Papadimoulis (on TheDailyWTF.com)