Posted 16 December 2008 - 08:11 AM
A bit more on memory. Each process has available to it a 4gB address space - this is not to be confused with your RAM.
The 4 gB address space may not be entirely used.
Without special switches, there's a 2 gB space for reserved for the kernel stuff and a 2 gB space reserved for the user stuff that's running in that process.
With the /PAE or the /3GB switch this means that 1 gB is for the kernel and 3 gB is for the user stuff. In addition to having a computer that's able to use this switch, you must also have an application that's aware of the switch - otherwise the switch does nothing for your memory.
All of this memory stuff is "virtual" - in that it doesn't have a fixed location in your memory. This method allows the computer to keep the most active virtual memory stuff in the RAM while relegating the rest of the virtual memory stuff to your pagefile (a file on your hard drive that simulates additional physical RAM). The Windows Memory Manager takes care of what goes where in the background - you won't see it's activity (directly) without special tools.
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