Hum,
You could run SysEdit. (Select Run in your Start menu, type SysEdit in the text box, and press Enter.) Click in the system.ini window. Scroll down to the [vcache] section. If you don't see one, type in [vcache] as a new heading. If you enter these two lines:
MinFileCache=0
MaxFileCache=65535
to limit it to 64MB of cache memory
If you have more RAM, enter these two lines:
or MaxPhysPage=20000
(to limit it to 512mb, or less, experiment with less)
Close SysEdit, saving changes on the way out, and restart Windozes.
To improve Swap File Performance on systems with large amounts of memory, more than 128Mb, the hard disk based swap file is not needed as much. This tweak optimises the use of the swap file on such systems. Using notepad open the SYSTEM.INI file in your Windows directory. Find the [386Enh] section and add a new line reading
"ConservativeSwapfileUsage=1".
Save the file and restart Windozes for the change to take effect.