Peter Geoghegan wrote:
Incidentally, I seem to recall that there is a way of using greater than 2GB of memory on 32-bit XP; It's a matter of turning on the so-called "3gb switch": http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx
which is suicide on the typical x86 32bit system that has max 3.2GB (+/-) addressable physical memory[1], never mind the issues it causes with reduced space for page tables and such.
if you read through all the microsoft KB articles and stuff on that flag, it was recommended for use only under tightly controlled circumstances, like a 32bit windows server that was dedicated to running 1-2 specific apps that were OK with it,.
[1] yes the hardware probably supports PAE to access physical memory above 4GB via page table extensions, but XP 32bit doesn't.
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