Scalability Pro helps you identify and fix potential and existing scalability issues with your site. Scalability is not quite the same as performance – it’s related to how well you can keep your site performing fast as your site gets larger.

A highly scalable site will not slow down as your site gets bigger.
The Scalability Pro Plugin is the core WP Intense plugin to transform the speed and scalability of your WordPress site. It does so primarily by eliminating table scans and using index seeks instead.