2850 freezing, leaving nothing in logs

[Johan De Meersman]

Torgrim Teigstad wrote:
> hola guys.
>
> I have been running a few 2850's for a year now, with debian sarge  
> and kernel 2.6.12.6.
> They have been running great with no problems.
>
> Last week one of them running postgres8 just freezed up. No errors in  
> RAC log, no errors in operating system.
> I tried to connect to it via our ipkvm, witch just gave me "no video  
> signal" and i had to go to the RAC and powercycle them.
> It came up, and have been working ever since.
>
> But now another one of our 2850's frooze in the exact same way. No  
> errors, no logs nothing.
> Happened 2 days in a row. So im suspecting something is buggy here.
>
> The 2 2850's that have the problems, both run postgres8 with the same  
> kernel (compiled by me).
> They run a mirror raid for the system and a raid0+1 for postgres data  
> with xfs filesystem (recomended for maximum postgres performance).
>
> Recently we have been adding alot of hardware to the rack, so i  
> suspect that it might be an heating problem. But that should also  
> trigger an alert in the rac. Or am i way off here?
>
> In the past i experienced simular problems with the 2650, then it was  
> a faulty raid controller. but i find it vierd that 2 raidcards on 2  
> servers breaks down in the same week ;) (im an optimist)
>
> Have anyone been experiencing simular problems with the 2850's?
>   

Yes, and also with 4600s. There's been a similar issue posted on the
list some time ago, where (just as with my 4600s) the network gave link
down/up messages without actually being so for a while pre-freeze.

No real solution found, but I've upgraded the kernel on the 4600s, and
haven't seen it since. Yet, that is... *goes and has a look at the
consoles* Nope, nothing as of yet :-)


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