RE: [Xen-users] webU and dom0 freeze

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Chris Fanning
> Sent: 09 November 2006 10:51
> To: Xen-users
> Subject: [Xen-users] webU and dom0 freeze
> 
> Hi,
> 
> I've a web server that has about 1500 visits (not hits) a day
> according to webalizer that has been working fine for a couple of
> years.
> 
> Yesterday I replaced the harddrives and installed xen on it. The web
> server is now running as a domU.
> We have two peak times a day. 11:00hrs and 17:00hrs. with an average
> of about 900 hits an hour.
> It is during these peak times that the server freezes. Both 
> domU and dom0.
> 
> My first thought was the file image, so I moved the web image off the
> files and onto a partition. That hasn't helped.
> 
> I'm a little lost. Where should I start looking?

My first thought is to connect a serial console onto another machine and
run Xen with "debug=y" - that may well catch something. Is dom0
completely unresponsive, and if so, does CTRL-A three times on the
console get you into Xen? There's a couple of commands you can use
there, "q" and "r", I think. 

Also attempting to find out what causes it to go wrong would be good. A
loop in Dom0 that does "xm info; xm list; sleep 1" forever (possibly to
a different machine so that you can see the result after the machine
goes down. There may be other things to look for, but that's a start. 

--
Mats
> 
> Thankyou.
> Chris.
> 
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