about page file size

[Boswell]

Hi,

I want to set the size of the page file residing in one of disk volumes. And
the system recommended size are a minimum size(1.5 times of the physical
memory size) and a maximum size (3 times). However, I seet that there is a
"System Managed Size) choice which will give the pagefile a smaller minimum
size. And this size is about the phsycal memory size plus a small number.
How is that small number decided? What is the current maximum size?
Thanks a lot.