Well it has to be constantly refreshed (I think?) if there's something important in it. But more I was thinking that you need more memory to support less-effici

Well it has to be constantly refreshed (I think?) if there's something important in it. But more I was thinking that you need more memory to support less-efficient memory usage in the first place, or, if the amount of memory is fixed, less of it would be used for things like the disk cache.