Hardware Logic published a guide on optimizing your Windows Page File. Here's a snip:
The Page File, or Virtual Memory as it’s called in Windows, is a feature that allows pieces of programs and data to be stored on a section of a hard drive, much like system memory, or RAM. In doing so, it helps free up real RAM resources, which are much faster but far more limited in size.
Today, we take a look at a basic Windows service known as the “Page File” or “Swap File” depending on your OS platform or how long you’ve been computing.