[wellylug] High load averages but no apparent cause

[Daniel Reurich]

Power supply not coping anymore (under spec'd) or mainboard capacitors
popped is my guess.



On Thu, 2010-03-25 at 07:51 +1300, David Harrison wrote:
> No, but now that you say that if the system is unable to write to the
> RAID5 which contains the log file would this even happen?
> 
> 
> e.g. /var is the problematic RAID5 partition and when it locks up it
> takes out one or more of the physical disks.
> 
> 
> An interesting observation is that when the problem occurs it either
> locks up both sda & sdb, or sdc by itself.
> I am guessing that this is because sda & sdb are on the same channel,
> so either the channel itself is going or one of the disks is which is
> taking the other with it.
> 
> 
> 
> David
> 
> 
> 
> 
> On Thu, Mar 25, 2010 at 12:14 AM, Daniel Reurich
> <daniel at centurion.net.nz> wrote:
>         Does anything show up in the syslog or dmesg that indicates
>         sata i/o
>         port resets or anything like that??
>         
>         Daniel Reurich
>         
>         
>         On Wed, 2010-03-24 at 20:53 +1300, David Harrison wrote:
>         > On Wed, Mar 24, 2010 at 6:36 PM, Daniel Pittman
>         <daniel at rimspace.net>
>         > wrote:
>         >         David Harrison <david.harrison at stress-free.co.nz>
>         writes:
>         >
>         >
>         >         > I will try the deadline scheduler tonight and see
>         if that
>         >         makes a
>         >         > difference.
>         >
>         >
>         >         You should be able to make the change at run-time,
>         through
>         >         sysfs, I believe.
>         >         It is a property of the hardware devices, IIRC, in
>         sysfs.
>         >
>         >
>         >
>         >
>         > I tried out a few of the schedulers and none of them helped
>         the
>         > problem.
>         > If anything I'd have to say it got worse.
>         >
>         >
>         > As a final test I have switched to the kernel that was
>         installed
>         > originally by Ubuntu (2.6.24-24-server).
>         > The problem still exists and I know for sure it didn't when
>         things
>         > were first setup.
>         > - There's just no way we could have migrated 400gig of data
>         onto the
>         > RAID if it was this flakey.
>         >
>         >
>         > Whatever it is is hardware related, and it seems to be
>         getting worse
>         > over time...
>         >
>         >
>         >
>         >
>         > David
>         >
>         >
>         
>         > --
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>         
>         
>         --
>         Daniel Reurich.
>         
>         Centurion Computer Technology (2005) Ltd
>         Mobile 021 797 722
>         
>         
>         
>         
>         --
>         
>         
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> 
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