Red Hat Enterprise 4 and (incorrect?) swap size

[Mark Ryden]

Hello,
  I am trying to install Red Hat Enterprise 4 on a machine with 64 bit
processor (Dual Xeon).

My machine has 2 GB of RAM; at boot, I see on the screen that the
PC says it has 2GB of RAM (and a look at BIOS validates it).

I choose "automatic partition".

There , it says 2GB for swap partition.
Why is it so? Shouldn't it be, by default,4GB ? (twice the size of RAM)?

should I leave it so or change ot to 4GB?

Regards,
MR