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Hyper V Slow File Opening

Posted on 2014-11-14
Last Modified: 2016-11-23
Hi all we have a Hyper V Environment On a Dell Power Edge Server

have noticed that file transfer opening Office Files and PDFs etc are painfully slow

we have read and disabled VMQ on the host Adapter but this has made no difference,

can anybody help with this issue

The server (Host) has 64 GB of Ram and is Hosting 3  VM Machines all running Server 2012 R2

Question by:pepps11976
  • 5
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LVL 38

Expert Comment

by:Philip Elder
ID: 40448892
When you say that you have disabled VMQ on the adapter was that done for every Broadcom port being used by a Hyper-V vSwitch?

How is the disk subsystem set up?

Fixed or Dynamic VHDX Files on a shared partition or individual partitions?

Are the C states disabled in the BIOS?

Please see my E-E article here: Some Hyper-V Hardware and Software Best Practices.

Author Comment

ID: 40449243
I have Disabled VMQ on the Physical Adapter in Network Card Properties - Configure - Advanced and then Disabled Virtual Machine Queues.

I have also Un ticked Enable Virtual Machine Queue in the Properties of the Virtual Machine under Network Adapter - Hardware Acceleration.

I have 6 Disks on the Host the OS is two Disks Mirrored, and the other 4 Disks are Raid 10

Author Comment

ID: 40450263
I have also noticed that when I restart the file server everything is speedy then about 2 mins after restart it goes back to being slow again
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LVL 38

Expert Comment

by:Philip Elder
ID: 40450367
What is the RAID setup? Hardware RAID or software RAID?

Drive type? SAS, SATA, 10K or other?
LVL 20

Expert Comment

by:Svet Paperov
ID: 40450914
Did you try changing the port on the physical switch where the host adapter is connected to?

Do you have teaming or it's a single adapter?

If you have another virtual machine connected to the same virtual switch: how about running some tests from there - is it slow as well?

Accepted Solution

pepps11976 earned 0 total points
ID: 40480580
This issue was caused by Anti Virus Software
LVL 38

Expert Comment

by:Philip Elder
ID: 40480640
Where was the A/V installed to be causing the problem?

Author Comment

ID: 40480643
On the File Server itself
LVL 38

Expert Comment

by:Philip Elder
ID: 40480729
Okay. Thanks for answering.

As a rule we put A/V on endpoints only. We do not install A/V clients on servers or virtualization hosts. That turns into a bear to manage for exclusions, but also drags down the servers themselves.

Folks should not be browsing or running e-mail from a server, all risky behaviours, anyway. It's the endpoints that work with the data so they are where we put the A/V client.

Author Closing Comment

ID: 40488448
Found the answer Myself

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