PAE causing system crashes

[Michael Barnett]

Nopers.  No nfs... nothing at all fancy with the drives except the raid.

-m

On Jan 18, 2006, at 7:03 AM, Ted Wisniewski wrote:

> You weren't by chance also using NFS?   I was, all my other 5.x  
> systems did
> not use NFS and are stable.  I saw this same behavior and wound up  
> going back
> to 4.11 to keep the system stable.
>
> Ted
>
> On Tuesday 17 January 2006 03:17 pm, Michael Barnett wrote:
>> 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.
>>
>> -m
>>
>> 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
>>> config:
>>>
>>> <snip>
>>> include PAE
>>>
>>> ident           SMP-PAE
>>>
>>> options         SMP
>>> options         KVA_PAGES=512
>>> </snip>
>>>
>>> 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:
>>>
>>> <snip>
>>> kern.maxdsiz="2147483648"                # Set the max data size
>>> </snip>
>>>
>>> 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.
>>>
>>> Thanks,
>>>
>>> -Michael
>>> _______________________________________________
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>>
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>
> -- 
> | Ted Wisniewski                    E-Mail:  
> ted at mail.plymouth.edu        |
> | Manager, Systems Group            WEB:    http://oz.plymouth.edu/ 
> ~ted/ |
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