SC1425 Server Hangs

[Gareth Bult]

Mmm,

All users (25) run Gnome desktop with the system monitor up showing CPU
and memory usage ...

It ain't-a-runnin out of RAM .. honest!

I get told when the load average goes over 0.9, I'd know if it was
swapping (!)
(incidentally, it only goes over 0.9 because of the cupsys bug that the
Ubuntu guys reckon isn't important enough to put right in Dapper.. I can
get a loaf average of 20+ .. although it doesn't seem to have any sort
of adverse effect on performance)

Gareth.

On Sat, 2006-10-14 at 12:27 -0700, Mann, Andrew wrote:
>                 The cases where I’ve seen the symptoms you describe
> happen are due to memory exhaustion or the disk subsystem dropping
> offline.  To figure out what’s happening you might keep a console open
> with ‘vmstat 15’ running – that should let you see memory decreasing.
> You might also configure syslog to log to a remote system, that should
> let you receive notification if the disk subsystem drops offline.
> 
>  
> 
>  
> 
> 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 3:55 AM
> To: PowerEdge
> Subject: SC1425 Server Hangs
> 
> 
> 
>  
> 
> 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 "respond" 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 
> 
> 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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