[SOLVED] ubuntu-16.04.1-desktop-amd64 VM running slow on Proxmox VE

[franman]

Hello proxmox community,

As the title says, my problem was that running Ubuntu as a VM on Proxmox is extremely slow during installation and post-installation.

I have already enabled Intel Virtualization Technology in my laptop's BIOS settings, but it still runs slow.

The host machine I am running on is a Lenovo Y510P laptop on a Windows 10 64-bit OS.

The specs of my machine are as follows:

• Intel i7-4700MQ CPU @ 2.4GHz
• 8 GB of RAM
• Nvidia Geforce GT 750M
• Samsung 840 EVO SSD @ 240GB

*In addition, I used an external SSD @ 290GB to run 4 clustered Proxmox servers via VMware.

If this helps, here are screen shots of the settings I have done for Ubuntu VM:


How can I speed up Ubuntu VM given that I am only a free subscribed user.

 

[LnxBil]

*In addition, I used an external SSD @ 290GB to run 4 clustered Proxmox servers via VMware.

You're running Ubuntu inside PVE inside VMware?

How can I speed up Ubuntu VM given that I am only a free subscribed user.

So, you're not a subscriber.

Proxmox is extremely slow during installation and post-installation.

Do you mean the graphical output or disk/cpu performance benchmarked via ssh? GUI is slow, PVE is not a desktop virtualisation system.

 

[franman]

Do you mean the graphical output or disk/cpu performance benchmarked via ssh?

For the former I do see a black screen and it takes a while for the graphical background to load in. Regarding the latter, when I checked the summary section I recall that the CPU usage was high (relatively from 80 to 90%). So both I guess.

GUI is slow, PVE is not a desktop virtualisation system.

Ya well you know the hard things you learn in life through experimenting; I've already switched to the server edition of Ubuntu.

You're running Ubuntu inside PVE inside VMware?

Correct.

So, you're not a subscriber.

Correct.

 

[LnxBil]

You're running Ubuntu inside PVE inside VMware?

Correct.

Running a hypervisor inside another hypervisor is good for testing purposes, yet I never would expect it to be fast. I'd always go with only one hypervisor.

Now to the matter at hand:
Have you enabled nested virtualisation in VMware? If not, so so.
Do you have KVM disabled in PVE? Default is enabled yet if something does not work with nested virtualisation, PVE suggests to disable kvm hardware acceleration and then you're getting very, very bad performance, because every command inside of your guest-guest has to be interpreted, instead of just run on the CPU.

 

[franman]

Now to the matter at hand:
Have you enabled nested virtualisation in VMware?

Yes I have, under settings->Processors for every Proxmox server I enabled Virtualize Intel VT-x/EPT or AMD-V/RVI.

Do you have KVM disabled in PVE?

Yes.

Anyways I've already uninstalled Ubuntu desktop VM and switched for the command-line (server edition).

 

[dcsapak]

Do you have KVM disabled in PVE?

Yes.

then it is expected to be slow, since pve must emulate a whole cpu instead of using the cpu virtualization features