[Cialug] Troubleshooting high latency/low speed

[Tom Pohl]

So is just the dom0 acting slow, or are all the domu's slow too?  Are you doing nic bonding or anything funky from the network side? I've seen a poor choice made for a disconnected nic as the primary interface and it still worked because it got bridged to the actually connected nic.

-Tom


On Jul 26, 2010, at 5:23 PM, Matthew Nuzum wrote:

> On Mon, Jul 26, 2010 at 4:55 PM, Tom Pohl <tom at tcpconsulting.com> wrote:
> Is it virtualized?  Is it possible that other hosts on that same virtual server are starving you out for IO or CPU?
> 
> -Tom
> 
> Yes, it is virtualized. It's a xen dom0 with three domu's running. Total server ram is 2G and each guest is using 512MB. Practically no swap is being used in any except the guest that actually has something active but the swap appears to be mostly just idle stuff. There's a significant amount of free RAM available. Load average is low on all.
> 
> I can duplicate the slow http access to content in both VMs that I tested on (the one that is active and one that is newly created and idle) which leads me to believe it's something either related to the entire server or the network that the server is on.
> 
> /me tests with another server on the same network...
> 
> I cannot duplicate the problem with another server on the same network which indicates it's a problem specific to this one computer.
> 
> Any tell-tale signs of problems I should look for?
> 
> -- 
> Matthew Nuzum
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> 
> "Never stop learning" –Robert Nuzum (My dad)
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