SC1425 Server Hangs

Gareth Bult gareth at encryptec.net
Sat Oct 14 16:39:07 CDT 2006


Ok,

When the system has gone down (in at least one instance) , Swap was <
100Mb (of 4G) and load average was less than 1.0 .. 

??

On Sat, 2006-10-14 at 12:42 -0700, Mann, Andrew wrote:
>                 Just because you have a lot of ram free now doesn’t
> mean you will when the system fails.  I have a system with 4GB of ram
> and 2GB of swap that runs ntop.  When started, ntop uses about 100 MB
> among all processes.  After about 4 weeks, if not restarted, it will
> use all 6 GB of RAM + Swap and the system shows the same symptoms you
> describe.
> 
>                 Regardless of what the problem is, you’re far less
> likely to see any symptoms now than you will at the time of system
> failure.
> 
>  
> 
> Andrew
> 
>  
> 
> 
> From:linux-poweredge-bounces at dell.com
> [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Gareth Bult
> Sent: Saturday, October 14, 2006 1:44 PM
> To: Jeroen
> Cc: linux-poweredge at dell.com
> Subject: Re: SC1425 Server Hangs
> 
> 
> 
>  
> 
> Hi,
> 
> It has 4Gb of RAM, it's not swapping out anything worth talking
> about ...
> (possibly 100k)
> 
> Gareth.
> 
> On Sat, 2006-10-14 at 11:45 +0000, Jeroen wrote: 
> 
> 
>  
>  
> Try monitoring if it's running out of memory and swapspace, if you have a
>  
> memory leaking application somewhere it won't matter how much memory you
>  
> throw at it, it'll just keep nibbeling it away until it bleeds to death
>  
> resulting in a situation you describe.
>  
>  
>  
> Jeroen Wunnink
>  
> Easyhosting.nl sysadmin
>  
>  
>  
>  
>  
> --------- Oorspronkelijk bericht --------
>  
> Van: Gareth Bult <gareth at encryptec.net>
>  
> Naar: PowerEdge <linux-poweredge at dell.com>
>  
> Onderwerp: SC1425 Server Hangs
>  
> Datum: 14/10/06 08:15
>  
>  
>  
> > 
>  
> > 
>  
> > 
>  
> > 
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> > 
>  
> > 
>  
> > 
>  
> > Hi,
>  
> > 
>  
> > We have a number of SC1425's, one in particular runs as a thin client
>  
> sever.
>  
> > (Ubuntu 6.06 LTS / LTSP)
>  
> > 
>  
> > Approximately once a week, it hangs.
>  
> > For one reason or another (remote site) I've not been able to see what's
>  
> on the console when it goes down and there's nothing in the logs when it
>  
> comes back up. (reset button)
>  
> > 
>  
> > When it's down, various ports &quot;respond&quot; in terms of connections
>  
> apparently opening, but no applications activate on the box.
>  
> > (i.e. can connect to port 22 on the server, but there is no response
>  
> beyond the connection)
>  
> > 
>  
> > Server responds to pings.
>  
> > 
>  
> > Config is dual-2.8G Xeon, (dual core), 4Gb RAM, single disk, NFS mounted
>  
> home.
>  
> > 
>  
> > Box goes down when (relatively) lightly loaded.
>  
> > 
>  
> > Other non-dell servers, same sort of config and /home NFS mount continue
>  
> unhindered.
>  
> > 
>  
> > So, not network, not nfs, not load .. anyone got any ideas ?
>  
> > 
>  
> > tia
>  
> > Gareth.
>  
> > 
>  
> > 
>  
> > 
>  
> > 
>  
> > --
>  
> > Gareth Bult, Encryptec Limited
>  
> > Tel: 0845 25 77033, FWD: 753977, Mob: 07891 389657
>  
> > Email: gareth at encryptec.net, MSN:garethbult at hotmail.com&nbsp;
>  
> > 
>  
> > Statements made are at all times subject to Encryptec's Terms and
>  
> Conditions of Business, which are available upon request.
>  
> > 
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> > 
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> > 
>  
> > _______________________________________________
>  
> > Linux-PowerEdge mailing list
>  
> > Linux-PowerEdge at dell.com
>  
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>  
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>  
>  
>  
> 
> -- 
> Gareth Bult, Encryptec Limited
> Tel: 0845 25 77033, FWD: 753977, Mob: 07891 389657
> Email: gareth at encryptec.net, MSN:garethbult at hotmail.com 
> 
> Statements made are at all times subject to Encryptec's Terms and
> Conditions of Business, which are available upon request. 
> 
> 
> 
>  
> 
> 

-- 
Gareth Bult, Encryptec Limited
Tel: 0845 25 77033, FWD: 753977, Mob: 07891 389657
Email: gareth at encryptec.net, MSN:garethbult at hotmail.com 

Statements made are at all times subject to Encryptec's Terms and
Conditions of Business, which are available upon request.
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