Strange reboot since 9.1

[Marcelo Gondim]

Em 06/03/13 07:55, Marcelo Gondim escreveu:
> Em 06/03/13 06:18, Marin Atanasov Nikolov escreveu:
>> On Wed, Mar 6, 2013 at 10:55 AM, Loïc Blot 
>> <loic.blot at unix-experience.fr>wrote:
>>
>>> Hello,
>>>
>> Hi,
>>
>>
>>> Since FreeBSD 9.1 I have strange problems with the distribution. Some
>>> servers are rebooting without any kernel panic, instanly. First i
>>> thought it's a problem with my KVM system, but one of my FreeBSD 
>>> under a
>>> Dell R210 have the same problem.
>>> The servers concerned are now:
>>> - Monitoring server
>>> - LDAP test server
>>> - Some other servers, randomly (not in production).
>>> First i thought it's a problem with my FreeBSD install, then i download
>>> another time the ISO but the problem was already here. After i try
>>> another thing, install 9.0 and upgrade to 9.1 but same problem.
>>> How can i get informations about this problem ?
>>>
>>>
>> I've had similar issues with one of my FreeBSD systems. My system had
>> spontaneous reboots without any kernel panic, without any clear 
>> evidence of
>> why it happened.
>>
>> After a lot of trials and tests the root cause appeared to be the 
>> amount of
>> ZFS snapshots I had, which were more than 1K on a 8G system.
>>
>> Upgrading from 9.0 to 9.1 didn't solve the issue, as clearly I had to do
>> some cleanup of the ZFS snapshots and since then it's more than a month
>> without any reboots.
>>
>> Few pointers that you could use -- get these systems monitored and 
>> keep an
>> eye on the monitoring system -- CPU usage, memory, processes, network
>> traffic, etc.. I've noticed that my system was running low on free 
>> memory
>> and that later led me to the ZFS snapshots clue.
>>
>> So, my advise is to get first these systems monitored and watch for
>> anything unusual happening. Then further investigate.
>>
>> Good luck.
>>
>> Regards,
>> Marin
>>
>>
>>> Thanks for advance.
>>> -- 
>>> Best regards,
>>>
>>> Loïc BLOT, Engineering
>>> UNIX Systems, Security and Networks
>>> http://www.unix-experience.fr
>>>
> I have same problem but I'm using UFS and FreeBSD 9.1-STABLE with 
> dumdev enabled (dumpdev="AUTO"). After spontaneous reboots, nothing in 
> /var/crash.
> Spontaneous reboots always happen between 00:00 am and 09:00 am.
>
> FreeBSD rt01.xxx.com 9.1-STABLE FreeBSD 9.1-STABLE #14 r247497: Thu 
> Feb 28 21:32:09 BRT 2013 root at rt01.xxx.com:/usr/obj/usr/src/sys/INTNET 
> amd64
>
> hw.machine: amd64
> hw.model: Intel(R) Xeon(R) CPU           E5606  @ 2.13GHz
> hw.ncpu: 8
> hw.byteorder: 1234
> hw.physmem: 8509702144
> hw.usermem: 7911686144
>
> Handle 0x0003, DMI type 2, 16 bytes
> Base Board Information
>         Manufacturer: Intel Corporation
>         Product Name: S5500BC
>         Version: E25124-453
>         Serial Number: BZBZ04800361
>         Asset Tag: ....................
>         Features:
>                 Board is a hosting board
>                 Board is replaceable
>         Location In Chassis: Not Specified
>         Chassis Handle: 0x0004
>         Type: Motherboard
>         Contained Object Handles: 0
>
> This motherboard have 2 CPU processors.
My last log:

boot time                                  Wed Mar  6 03:14
boot time                                  Wed Mar  6 02:29
boot time                                  Tue Mar  5 04:32
boot time                                  Mon Mar  4 08:16
boot time                                  Mon Mar  4 07:09
boot time                                  Mon Mar  4 05:54
boot time                                  Mon Mar  4 05:14
boot time                                  Mon Mar  4 04:33
boot time                                  Mon Mar  4 04:29
boot time                                  Mon Mar  4 04:10
boot time                                  Mon Mar  4 04:01
boot time                                  Mon Mar  4 03:22
boot time                                  Sun Mar  3 05:55
boot time                                  Sat Mar  2 08:02
boot time                                  Sat Mar  2 07:54
boot time                                  Sat Mar  2 07:11
boot time                                  Sat Mar  2 05:33
boot time                                  Sat Mar  2 05:09
boot time                                  Sat Mar  2 04:56
boot time                                  Sat Mar  2 04:19
boot time                                  Sat Mar  2 04:13
boot time                                  Sat Mar  2 04:04
boot time                                  Sat Mar  2 03:27
boot time                                  Sat Mar  2 03:20
boot time                                  Sat Mar  2 02:51
boot time                                  Sat Mar  2 02:40