OT: XP TaskManager - Physical memory vs PageFile?

Tried posting this on the Windoze XP General NG, but no luck.

But I have an Asus motherboard... so maybe I'm technically
on-topic....


When I look at Windows Task Manager | Performance | PF Usage, I
get a consist ant half-gig (545 mb at the moment).

Yet Physical Memory (K) says I've got (at the moment) 143,742k
available.

Two questions:
-------------------------------------------------------------
1) Do the PF/Physical reflect an opportunity for more
optimization? i.e. If I've got physical memory available,
wouldn't it be better tb using that instead of the page file?

2) Is PF usage unconditionally an undesirable thing?
i.e. If I add enough memory and tweak the right
settings, could I get it down to or close to zero?
--------------------------------------------------------------

I'm starting to feel a little better since seeing my CommitCharge.Peak
at 814,080 - which seems like it would have had the 768 megs of memory
thrashing for at least some period during my current sesh.

Any thoughts on whether Commit Charge.Peak includes memory used by the
system for file caching? I see Physical Memory.SystemCache =
2,980,476 as I write this.