Memory problem,Urgent Help!

[Huang Longbo]

Hi,all
I ran a program under FreeBSD 4.11.I have 1G RAM and I set the SWAP to 3G(I 
only have one partition). But the system gave an error msg "Unable to alloc 
xxx bytes" during the running. And I noticed that when the Swap usage was 
only 1%. Shouldn't the whole SWAP be used as the virtual memory? Or do I 
need any extra setting to do so?
I will really appreciate it if anyone can help.
Thanks a lot.



Cheers
Longbo Huang