windows 2008 r2 on Proxmox 2.x very slow - howto get more performance ?

[fpausp]

We use Windows 2008 R2 Server on a Proxmox 2.x VE, the clients (5 users) are working with an ncomputing thinclient (futro L300) directly on the server.

There are two additional virtual Linux Servers (Mysql Database and Filserver, Domaincontroller ...) running on the same Hardware.

The Problem is that the Performance is very bad for the users, how can I find out what is going wrong there... ?

bootdisk: virtio0
cores: 1
cpuunits: 500000
ide0: local:iso/rodata.iso,media=cdrom,size=85774K
keyboard: de
memory: 22000
name: win2008r2wn-245
net0: virtio=XX:XX:XX:XX:XX:XX,bridge=vmbr0
onboot: 1
ostype: w2k8
sockets: 1
virtio0: local:114/vm-114-disk-1.raw,size=250G

 

[dea]

We use Windows 2008 R2 Server on a Proxmox 2.x VE, the clients (5 users) are working with an ncomputing thinclient (futro L300) directly on the server.

There are two additional virtual Linux Servers (Mysql Database and Filserver, Domaincontroller ...) running on the same Hardware.

The Problem is that the Performance is very bad for the users, how can I find out what is going wrong there... ?

bootdisk: virtio0
cores: 1
cpuunits: 500000
ide0: local:iso/rodata.iso,media=cdrom,size=85774K
keyboard: de
memory: 22000
name: win2008r2wn-245
net0: virtio=XX:XX:XX:XX:XX:XX,bridge=vmbr0
onboot: 1
ostype: w2k8
sockets: 1
virtio0: local:114/vm-114-disk-1.raw,size=250G

Hardware performance ? CPU, storage, network ?
1 socket and 1 core are a little poor...
22 Gbyte of RAM for 5 users ??? WOW

Luca

 

[fpausp]

CPU0: Intel(R) Xeon(R) CPU E5-2420 0 @ 1.90GHz stepping 07
Storage: I am not sure what you mean, how can I debug this info ... ?
Network: Fast Ethernet

How many cores and sokets are possible ?

 

[blurrrr]

Running with SBS2011 - no performance-problems

bootdisk: virtio0
cores: 4
cpuunits: 100000
memory: 12288
name: SBS2011
net0: e1000=9E:41:3D7:4B:A2,bridge=vmbr9
onboot: 1
ostype: w2k8
sockets: 1
virtio0: storage:112/vm-112-disk-1.raw,format=raw,cache=writeback,size=500G

And a lot of other VM's running on the same machine with really ugly "green" storage-hdd's...
You should check the HDD-cache-settings of your VM

 

[WhiteStarEOF]

I would start by giving the VM another core and see what that does to your performance. It's an easy test.

 

[fpausp]

OK, I will try to use more cores, is it possible to visualize under Proxmox-gui or console ?

 

[WhiteStarEOF]

Not sure here. Are you asking if you can make the change through the Proxmox GUI? If so, yes you can. Just click the VM, click the Hardware tab, then double click the Processors entry. You'll have to shut down your VM for the change to take effect.

 

[udo]

OK, I will try to use more cores, is it possible to visualize under Proxmox-gui or console ?

Both!
But you must stop/start the VM - restart is not enough.

What shows top on the host during performance problems?


Udo

 

[giner]

We use Windows 2008 R2 Server on a Proxmox 2.x VE, the clients (5 users) are working with an ncomputing thinclient (futro L300) directly on the server.

There are two additional virtual Linux Servers (Mysql Database and Filserver, Domaincontroller ...) running on the same Hardware.

The Problem is that the Performance is very bad for the users, how can I find out what is going wrong there... ?

bootdisk: virtio0
cores: 1
cpuunits: 500000
ide0: local:iso/rodata.iso,media=cdrom,size=85774K
keyboard: de
memory: 22000
name: win2008r2wn-245
net0: virtio=XX:XX:XX:XX:XX:XX,bridge=vmbr0
onboot: 1
ostype: w2k8
sockets: 1
virtio0: local:114/vm-114-disk-1.raw,size=250G

Be sure that:

- hardware virtualization is enabled
# lsmod | grep kvm
kvm_intel 52794 30
kvm 316356 1 kvm_intel

- you use hardware raid with write cache enabled

 

[fpausp]

root@proxmox:~#  lsmod | grep kvm
kvm_intel              52794  152
kvm                   316388  1 kvm_intel

 

[dea]

root@proxmox:~#  lsmod | grep kvm
kvm_intel              52794  152
kvm                   316388  1 kvm_intel

Poor disk performance [storage, if you use SAN, NFS, ecc] ?

 

[fpausp]

 

[giner]

View attachment 1492

Is it protected by battery/ZMM ?

 

[hotwired007]

From what i can tell from the info you have given us:
Your physical server has:
Intel(R) Xeon(R) CPU E5-2420 - 6 Cores @ 1.90GHz (with 12 threads)
http://ark.intel.com/products/64617
but you have configured your Windows 2008 R2 VM to use 1x 1.90Ghz CPU and has 22GB RAM running from a virtio 250GB virtual HDD from the local drive.

The easiest way you can improve performance is to bump up the amounts of CPU cores on the VM. everything else seems to be as good as you can get it.

If you have 5 concurrent users i would suggest a minimum of 4 cores be allocated to the VM otherwise your server has a single core being battered with the rest doing nothing - if you have two other VMs with each a single core that should be plenty for each of those.

 

[ravistellus]

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