questions about Fatal Trap 12

[Ray]

Hello,
I have received a kernel Trap 12 error several times now and am trying to 
figure it out. 
the error occurred today, and the previous time was about two weeks ago. 
last time I had to run fsck manually if that proves anything.


uname -a gives the following:

FreeBSD wserver.********.com 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Wed Sep 
17 13:30:46 MDT 2008     root at wserver.*********.com:/usr/obj/usr/src/sys/MOD  
amd64


Google returns results mostly for versions 4.x and 5.x, but it suggest 2 main 
things: 
test ram, and kernel panic troubleshooting. 
(http://www.freebsd.org/doc/en/books/faq/advanced.html#KERNEL-PANIC-
TROUBLESHOOTING)

Is there a way to test the ram without removing it from the machine and leave 
the machine functioning. I've used memtest 86 before, but obviously the 
machine has to be offline for this test.

However, I'm a little unsure of the instructions in the handbook on 
troubleshooting. namely, it talks about using the nm command, put I can't 
figure out the data file to give it as an argument, and second I'm unsure about 
using a debugging Kernel on a production server. I have heard that It will 
significantly slow down a machine.
Any help or suggestions would be greatly appreciated.
Ray