Very poor performances

[smorland]

Hello.

In advance, sorry for my bad English.

I'm new on Proxmox. I plan ti use it to run Two Vms.
- 1 to do monitoring (FAN - Fully automated Nagios)
- 1 Ubuntu server 14 (Open Vpn Server, Ubquiti Unifi)

I have installed Proxmox VE on Shuutle barbonne.
Their caracteristics are :

CPU : Atom D2550, 1,86 Ghz - 4 Core
Ram : 2 Gb

I create a VM to test with 4 CPU Cores, 2 Gb Ram.
Vitrio and network for disk type.
I upload the Fan Iso file on the proxmox server.

The problem is that the vm system is very slow. The setiup of fan takes hours.

Before installing proxmox on this Shuttle, I have tried FAN directly on it (without Virtualizer environnement) and It was very fast.
So it seems to signify that the proxmox server is the source of the problem.

I have tried to create a new VM withe Ubuntu server and the problem is the same.

When I look for perfomances in the Summary tab, everything seems to be fine. CPU usage around 40%. Memory around 700 Mo...

I am sure that I didi bad configuration or that I can tweek it.

Could you please give me advise ?

Thanks in advance.

Sylvain.

 

[Mr.Holmes]

Hello smorland,

I have installed Proxmox VE on Shuutle barbonne.
Their caracteristics are :

CPU : Atom D2550, 1,86 Ghz - 4 Core
Ram : 2 Gb

This processor is not sufficient for running run kvms with an acceptable performance. Especially it does not have VT-x capability (see http://ark.intel.com/products/65470/Intel-Atom-Processor-D2550-(1M-Cache-1_86-GHz)).

If it is an option for you run CTs instead (rather not because you cannot use the installation media in that case). Otherwise acquire another computer containing a CPU with VT-x capability (e.g. http://www.zotac.com/products/mini-pcs/zbox/intel/product/intel/detail/zbox-id92-plus-1.html), you can verify on the intel product pages (see example above) if this is the case.

Success!

Mr.Holmes

 

[m.ardito]

pve runs both kvm and openvz.

kvm can "run" also without the above virt features, but it will have no hardware assistance, so its all by software, and it's so slow that you can just barely use a low profile headless linux server. For that to be of practical use, you need that virt flag in your cpu & bios.

if you can adapt to use openvz, those are containers, and don't need "assistance", they run really on your hardware nearly at full speed, very little overhead (far less than kvm), isolated from others, and the host. There are some (possibly minor, it depends on what you need) limitations: ie running java, the kernel is forcely the host's one, etc.
And you can't just put your .iso in pve and create a container, you need to get a template (or build one).

pve wiki has plenty of info on containers and templates, see
http://pve.proxmox.com/wiki/Installation#Create_Virtual_Machines
and http://pve.proxmox.com/wiki/Get_Virtual_Appliances

Marco