I am running Apache 2.2 on CENTOS 5.5 i686 with WHM 11.30.3 (build 5) and by using Pingdom and Webpagetest I am seeing a 5 sec delay between first byte and resolution of www on one of my Wordpress sites.
The site was setup in Wordpress to use the www and not simply //sitename...
I LOVE the speed I get when checking my site without the www, but when it sits and resolves, this is taking 5 to 10 seconds - dramatically slowing my site.
Where should I start to look for issues?
Once it gets going it runs fine; just the initial resolving that is stalling out somehow.