Originally Posted by Fazed
The best analogy would be keeping food in your pantry for quick access. The pantry is RAM. Retrieving food from your pantry is nice and quick, but getting food to the pantry from the store (SD card or other semi-permanent storage) takes time. The optimal thing to do is to keep the pantry filled close to capacity.
Right, but you always want a decent amount of free space, because if you happen to go buy a few things, you have no pantry space to put it