Tuning is done by evaluating bottlenecks, logfiles, server stresstests and by studying boring documentation. Quintagroup.com is a fine-tuned server environment which gives you the speed you need for your content management software.
Here is our hardware setup
Our main servers are located in Serverbeach datacenter in San Antonio, Los Angeles, Virginia known for its great internet connectivity. This datacenter features on-site, auto-switched power generator, and centralized UPS systems provide power conditioning and ensure uninterrupted data center operation. Additionally, the generators are regularly tested to ensure that it will continue to function in the event of an emergency. Our data center is physically isolated from everyone but level three technicians. Public access is strictly forbidden. Access to the floor the datacenter resides on is restricted and completely locked down. Our servers are connected to a 100% Cisco Powered Network. Using enterprise-class Cisco networking gear, all routers, layer-2 switches, and layer-3 switches are tested in labs prior to deployment to ensure stability and interoperability.
Our servers are running modern Fedora distributions
We keep the number of sites per servers very low. The actual number of sites depends on how much ressources the sites use but we never "push our servers to the limit".