PAE causing system crashes
mbarnett at measuremap.com
Tue Jan 17 12:17:44 PST 2006
To ammend this slightly.. When running the PAE kernel, they will
stay online indefinitely under little to no load. It is only when i
want them to actually work will they freak out and reboot.
On Jan 17, 2006, at 1:47 PM, Michael Barnett wrote:
> I have 3 dell machines with 2x xeon procs, 8G of ram, and a half
> terabyte raid 5. I attempted to run the AMD64 distribution on
> these boxes which was fine for everything except mysql, (which is
> all these boxes are going to do) so I reinstalled 5.4 i386.
> uname -a looks like (hostname obscured):
> FreeBSD myhost.mydomain.com 5.4-RELEASE-p9 FreeBSD 5.4-RELEASE-p9
> #2: Mon Jan 16 23:27:12 PST 2006 root at myhost.mydomain.com:/usr/
> obj/usr/src/sys/SMP-PAE i386
> My problem is, if i don't enable PAE in the kernel, i can only
> address half the ram in the boxes, but... the machines are stable.
> If i do enable PAE, i can address all the memory, but they randomly
> reboot without dumping any errors or logging.
> To enable PAE, i am building and booting off the following kernel
> include PAE
> ident SMP-PAE
> options SMP
> options KVA_PAGES=512
> I added the KVA_PAGES options hoping to stabilize the machine
> (doesn't seem to have made any difference.) The only other tuning
> i am doing at the moment is in loader.conf:
> kern.maxdsiz="2147483648" # Set the max data size
> When i boot without PAE I use the generic SMP kernel, and the
> machine is stable.
> I know that there are a number of other kernel tunables i could be
> tweaking, but I am not really sure where to start as the machine
> dies silently. I was hoping that someone who has run a stable PAE
> kernel with 8G of ram + could point me in the right direction.
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