FreeBSD Kernel panic

Hardware Details:
Chassis: Tyan Transport GX28 (B2882)
Motherboard: Thunder K8S Pro (S2882)
Memory: 1G Registered ECC
Disk: 36G WD Raptor

Right now we are running amd64/FreeBSD 5.3-RELEASE #0

The machines only runs Mysql and under load the kernel panics and we
get the following error:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x88
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xffffffff80389aea
stack pointer           = 0x10:0xffffffffb2051a60
frame pointer           = 0x10:0xffffff006b12d000
code segment            = base 0x0, limit 0xfffff, type 0x1b
                       = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 53 (pagedaemon)
trap number             = 12
panic: page fault
cpuid = 0
boot() called on cpu#0
Uptime: 10h18m49s 

Not sure what is causing this problem!  very perplexing!