Usually, when you get the low on resources warning, one of 2 things has happenned;
You have either run out of virtual memory, or you have a memory leak.
Memory leaks can be very hard to track down. The best way to eliminate them is to shut downmost of the background applications that so many software packages install for you.
90% of the icons in the system tray are memory wasters.
Virtual memory can be tougher.
Windows will not use all of the open drive space for virtual memory.
I like to leave a minimum of 2GB free space on the drive where the swap file is located.
Keeping temp files cleaned out, and the drive defragmented are your best defenses against running out of resources.
Do not fall victum to the old Windows 3.11 maxum of setting virtual memory to 2X ram. Let windows use as much drive space as you can.
As to real memory, there are numerous tales and opinions.
Many resources state the 9X doesn't "effectively" utilize memory over 128MB.
A test that I read reported optimum performance in 98 with 196MB. The test applications ran slower with either more or less RAM.
On a practicle basis, 9X cannot use more than 511MB.
While this is very configuration dependant, many users report major system problemswith 512 or 1GB of RAM installed.
Windows apparently gets confused, and ignores most of the RAM. And refuses to boot because there is not enough RAM to install the drivers.
That said, I run my personal 9X boxes with 384MB.
I did set up 2 systems with 196MB, and they did appear to run slightly faster then the boxes with 384MB.
Chas