[PVE-User] WG: Very slow server (RAW IDE discs and KVM)

[Holger Ernst]

Hi, 
can you install 'atop' into the vm? It shows much more specific data about network and disk io (kernel paches not needed).
Your transfer speed is very slow so i would focus on network problems. Poor caching shouldn't be SO slow.

Regards, Holger

-----Ursprüngliche Nachricht-----
Von: pve-user-bounces at pve.proxmox.com [mailto:pve-user-bounces at pve.proxmox.com] Im Auftrag von Erik van Ast
Gesendet: Montag, 8. August 2011 12:06
An: CoolCold
Cc: pve-user at pve.proxmox.com
Betreff: Re: [PVE-User] Very slow server (RAW IDE discs and KVM)

Yes, after the changes I have shut down and after that restart the
server...

Kind regards,
_______________________________________________________________


-----Oorspronkelijk bericht-----
Van: CoolCold [mailto:coolthecold at gmail.com] 
Verzonden: maandag 8 augustus 2011 11:55
Aan: Erik van Ast
CC: pve-user at pve.proxmox.com
Onderwerp: Re: [PVE-User] pve-user Digest, Vol 41, Issue 4

On Mon, Aug 8, 2011 at 1:52 PM, Erik van Ast <Erik.van.Ast at suzohapp.nl>
wrote:
> Hi all,
>
> @Fabian and @CoolCold thank you for your reply.
> I have connected with putty (SSH) and ran #top.
> I see 4 CPU lines (CPU0-CPU4) and the max I have seen now during 5 
> minutes of watching it is 15%, but most of the times, it's 1 Cpu doing

> 4% and 1 doing 2%, so I presume that's not the problem?
>
> I also edited the .conf file located in /etc/qemu-server and I have 
> tried both " ide0: local:108/vm-108-disk-1.raw,cache=writethrough" and
"
> ide0: local:108/vm-108-disk-1.raw,cache=none" but with both configs I 
> didn't see any major improvements.
I hope you did virtual machine restart after that changes?

 The virtual server has been installed
> with 2 virtual discs, 1 of 40GB and the second with 200GB.
> The machine is especially slow when copying large data over, than the 
> speed drops to about 30-70 Kbyte/sec instead of at least 20
Mbyte/sec...
>
> Anyone seen this before? Help is greatly appreciated...
>
> Kind regard,
> Erik

<skip>

Best regards,
[COOLCOLD-RIPN]

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________
_______________________________________________
pve-user mailing list
pve-user at pve.proxmox.com
http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user