Quote from Scataphagos:
Maybe not. You'd be looking for very LOW PF usage... 450 MB of PF sounds like a lot... If you really used that much, then you could benefit from more RAM. (The page file is RAM's "overflow buffer".)
With all of your stuff open, you want to see how much PHYSICAL RAM is being used.
Clarify...
To conclude that you would not befefit from additional RAM, you want to run Task Manager and see BOTH...
1. Physical RAM useage of maybe 7-800MB tops (XP is always going to reserve some RAM for anticipated demands later in the session), AND
2. Low Page File usage... that means the "overflow buffer" is not being used much... XP is always going to show some PF usage, even when PF is disabled... mine shows about 52MB of PF even though I have it disabled.... not sure why that it is, however.
Not 100% positive about this explanation, but I believe it's mostly accurate.
When XP starts up + all through the session, whatever files are used are kept "at the ready". XP recognizes how frequently files are accessed, and the less frequently used are "paged out" to the page file.. that would include files used only at startup.. they may not be used again before you shut down, but they're still kept "at the ready". High priority and frequently access files are kept in RAM.
Vista and W7, I presume, like to have lots of RAM because they take a different approach.. they try to cache everything... all system and program files accessed in the session + web pages... in RAM for faster subsequent access. Makes sense to do it that way for better performance, but requires much more RAM for peak performance. (RAM was expensive in 2001 when XP came out.)