Windows NT Server Paging File

Generally the page file size should equal the amount of ram + about 10%. For 512 meg a good size would be 600 meg. If space is an issue on the boot drive you can split the page file across multiple drives.

Windows NT Server and Windows 2000, determine the size of the pagefile multiply the amount of physical RAM by 1.5.

When you create the pagefile(s), you are asked to set the initial and maximum size of the paging file. Under Perfmon, observe the paging file: %usage peak parameter. To optimally set the pagefile, set the initial size parameter of the pagefile at % usage peak value. As a corollary to this rule of thumb, at a minimum, set the paging file initial size to twice the size of physical memory and the maximum size for the pagefile to two times physical RAM (to a maximum of 4 GB). This will to minimize spending any resource time extending the size of the paging file and waiting for the paging file extension to complete. Continue to observe your baseline. Constant use of the paging file is one of the major indications of a memory bottleneck.

from: http://www.microsoft.com/TechNet/winnt/instant.asp
title: Optimizing Virtual Memory

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