Re: network / performance problems

[Ron Peterson]

On Sun, 22 Feb 2004, Ron Peterson wrote:
> On Sat, 21 Feb 2004, Ron Peterson wrote:
> > On Fri, 20 Feb 2004, Andrew Morton wrote:
> > 
> > > There are a few things you should try - you probably already have:
> > > 
> > > - Stop all applications, restart them
> > > 
> > > - Unload net driver module, reload and reconfigure it.
> > > 
> > > If either of those (or similar operations) are found to bring the latency
> > > back to normal then that would be a big hint.  ie: we need to find
> > > something which brings the performance back apart from a complete reboot.
> 
> This machine is starting to head south again.  I've updated user.log (a
> bunch of stats I'm syslogging) at
> http://depot.mtholyoke.edu:8080/tmp/.  I've also added
> http://depot.mtholyoke.edu:8080/tmp/mist/10/, which contains the latest 
> smokeping graphs.
> 
> In about an hour or two, I'll likely have to head in to get this thing
> back on its feet.  I will try the suggestions above, to see if that will
> do the trick.  Is there anything else I should try to do or look at?  Once
> I reboot (if that's what I have to do), I expect it will be a couple of
> days before this happens again.

I couldn't get it back.  I stopped apache, mimedefang, sendmail,
imapproxyd, and ifdown'd the interfaces.  Waited a bit, put them back up,
and still had large ping times.  I then ifdown'd the interface and removed
the e1000 module.  I couldn't get it back again though, I think because I
had some nfs mounts I couldn't unmount.

I rebooted.  I set the BIOS to not run hyperthreaded, to see if that has
any effect.  Now wait...

_________________________
Ron Peterson
Network & Systems Manager
Mount Holyoke College

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