system crawling....

[Mickey Moore]

Is it possible that the primary DNS server is not responding and a timeout must occur each lookup before switching to the alternate? This type of external wait delay would not be affected by the speed of the 8x2GHZ system.


--- On Thu, 10/2/08, Gavin McCullagh <gmccullagh at gmail.com> wrote:

> From: Gavin McCullagh <gmccullagh at gmail.com>
> Subject: Re: system crawling....
> To: edubuntu-users at lists.ubuntu.com
> Date: Thursday, October 2, 2008, 4:48 AM
> Hi,
> 
> On Wed, 01 Oct 2008, Luis Montes wrote:
> 
> > I wasn't able to authenticate on a text terminal
> either, so I couldn't 
> > run top to see what was going on. The disks
> weren't really spinning much 
> > either.
> > 
> > Then about ten minutes later something freed up, and
> I'm in now.  No 
> > idea what it was, but with 8 x 2GHz cores and 16 gigs
> of ram, you'd 
> > think it would be able to get through standard ubuntu
> init stuff without 
> > issues.
> 
> Agreed.  Can you look back through /var/log/syslog and
> /var/log/messages
> during the time and see if there's anything that might
> indicate the source
> of the issue?
> 
> One possibility might be a rogue process hogging all system
> RAM which
> eventually might have been killed by the kernel (that kill
> would be
> logged).  There are many more possibilities though.
> 
> > Related to my first problem though, why are the thin
> clients dependent 
> > on the server being able to launch gdm itself? X on
> the server shouldn't 
> > even be necessary.
> 
> As far as I know, in LTSP5 gdm is not needed.  It was in
> LTSP4 because gdm
> was what the clients connected to.  However, as the client
> runs its own
> display manager and starts a session over ssh, I don't
> think gdm running
> is necessary.  Presumably you've observed something
> that makes you think it
> is?
> 
> Gavin
> 
> 
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