Server crashing, no explanations

[Roberto Nunnari]

Then, if crash dumps are enabled, it could be a HW failure..
Once I had a server crashing with no dumps, and I found out
it was I power supply problem.

Best regards.
Robi


Alan Gilmour wrote:
> Hi Roberto,
> 
> There's nothing in /var/crash
> 
> Any other ideas?
> 
> Cheers
> 
> Alan
> 
> On 20/05/2008, Roberto Nunnari <roberto.nunnari at supsi.ch> wrote:
>> Crash dumps should help.
>>
>>
>> Alan Gilmour wrote:
>>> Hey all,
>>>
>>> We have recently been getting a lot of traffic to one of our sites.
>>> The CPU is consistently during busy periods using 100% utilisation.
>>> When this happens we have approx 150 apache threads, and the loads
>>> goes way above 15.
>>>
>>> However recently the server has been auto-restarting (when under heavy
>>> load) with no explanation in any logs. I've checked the console log,
>>> messages, db logs e.t.c. but no mention of anything wrong.
>>>
>>> Brief server summary :
>>>
>>> FreeBSD 6.3-STABLE #0:
>>> CPU: Intel(R) Xeon(TM) CPU 2.80GHz (2800.11-MHz 686-class CPU)
>>>  Logical CPUs per core: 2
>>> real memory  = 17716740096 (16896 MB)
>>> avail memory = 16837763072 (16057 MB)
>>> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
>>>
>>> We tried installing mbmon and lmmon and healthd, but none seem to work.
>>>
>>> Anyone got any suggestions for other things we can try to detect why
>>> the server is failing? or other ways to check things like CPU temp and
>>> memory status?
>>>
>>> Cheers
>>>
>>> Alan
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>>
> 
>