it could well be that my assumptions are wrong. It wouldn't be the first time.
My interest is more than academic though because system performance is terrible. It won't even play a CD smoothly. I can see that bumping up the swap file size will help, but in my uninformed opinion that's just covering up the underlying problem. Starting an application causes the swap file size to grow. It seems to me something has grabbed most of the memory in the system and is starving the other applications.
In the article you linked to the point about CD & CD/RW drives is very interesting because this machine does have a CD & CD/RW drive. I don't know how they are configured. But I will find out. :-)