blog.docker.com runs Wordpress, and the domain points directly at an ELB. Unless they are running some caching layer (behind that ELB but in front of their word

blog.docker.com runs Wordpress, and the domain points directly at an ELB. Unless they are running some caching layer (behind that ELB but in front of their wordpress processes), they may have to scale out a lot in order to handle traffic spikes, and they may be limited in their ability to do that by DB capacity.