There is no need for paging at all if your programs doesn't ask for it.
Globally you should have at least 2MB of it. Some games and programs demands more.
In order to prevent page file fragmentation.
Maximum size.
From TechNet: Set the Same Initial and Maximum Size Setting the paging file's initial size and maximum size to the same value increases efficiency because the operating system does not need to expand the file during processing. Setting different values for initial and maximum size can contribute to disk fragmentation.
That depends on how much memory is being used by the operating system, the apps and their data. In general a paging file is 2 to 3 times physical memory so, 4x the physical memory (paging file of 3x physical memory + physical memory) will guarantee enough room for all data IF the paging file is set to 3x physical memory. There would be more needed for the devices attached to the processor, but there will be holes in memory and these holes most often more than make up for the memory of attached devices.
The recommended minimum size is equivalent to 1.5 times the RAM on your computer, and 3 times that figure for the maximum size.
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How to manually change the size of the virtual memory paging file You must be logged on as an administrator or as a member of the Administrators group to complete this procedure. If your computer is connected to a network, network policy settings may also prevent you from completing this procedure. 1. Click Start, click Run, and then type sysdm.cpl in the Open box. 2. Click the Advanced tab, and then click Settings under Performance. 3. Click the Advanced tab, and then click Change under Virtual memory. 4. Under Drive [Volume Label], click the drive that contains the paging file that you want to change. 5. Under Paging file size for selected drive, click Custom size, type a new paging file size in megabytes (MB) in the Initial size (MB) or Maximum size (MB) box, and then click Set.
By default the paging file 1.5 times the size of the RAM installed
Start->Control Panel->System->Advanced->Perfomance Settings->Advanced->Virtual Memory Change. Choose a hard drive where you want to put the paging file, then custom size.
The sizing of a paging file is usually dependent on the amount of physical memory installed, which you do not indicate in your question. Maximums can be set according to the amount of disk space available and their placement. Sometimes you can set the maximum much higher than would be used by the operating system, leading to wasted allocation of disk space.
No. While most O/S use the hard drive to store temp data as memory, there is only one page file. The most efficient method is to increase your page file to 5 percent of your hard drive size and make the two values the same. This way the O/S will keep that area open for paging and not Fragment the paging file
The minimum recognize Outlook PST File size when you create a new Outlook Data file will be 265 Kb.