If your system only has 2 g ram then increasing the page file size will typically lower system performance… its not an exact science but as a rule of thumb, the page file will help a bit with large file transfers (like movies) and low end trickle software like torrents (marginal) but the day to day stuff doesn’t (and shouldn’t) get funnelled into the page file.
Having a large page file will also affect disc performance in a negative way and that’s why people recommend placing your page file on a different drive to the system (c) drive if available because that takes some pressure of the system drive and is most useful when running virtual software like wm-workstation.