w2k8 r2 poor performance on vm

[wb2]

We're had great luck using w2k8 on our VMs except for one server.  This one app which also makes use of a database runs horrible in a virtual environment on w2k8, but just great on an old physical 2950 physical server running w2k8 or even a virtual windows 2003 server is fine.  Does anyone have any ideas what could be the issue or where I could start looking? 

[JCMorrissey]

Hi,

i) You using vmxnet3 drivers? if not i would

ii) Would use LACP if your switches have the capability http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=100404... (more a nice to have though as you mentioned the other vm's ok

iii) Take a look http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=100951... too

Many tx

[admin]

Can you please add some more details to your description?

• Did the software vendor give specific instructions for virtualizing the application?
• Is the database remote or local?
• Does the issue still happen when the VM is running alone on the host?
• Do you see any kind of bottle neck within the guest OS?
• What hardware specs does the host have?
• What hardware specs does the physical server have?
• What exactly is horribly slow, how can you measure this?
• Did you pull a performance log bundle from the host or had a look at esxtop yet? (http://www.yellow-bricks.com/esxtop/)

[jdptechnc]

You need to look at the performance data for the guest OS itself (Performance Monitor, Resource Monitor, or Task Manager for a quick snapshot of processes).

You need to look at the VM's performance stats in vCenter.

You need to look at the host's performance in vCenter and/or using esxtop from the command line.

What did you allocate to the database VM in terms of vCPU and memory?  What kind of storage is it hosted on?

[thb_]

is this app running Java?

Also please. set the VM power plan to maximum an see if the performance is better:

http://windowsazurecat.com/2011/06/windows-20082008-r2-default-power-plan-of-balanced-can-increase-l...