Citrix Guest OS / Host OS CPU Utilization Inconsistency?

[JimmyParity]

Dear Sir

Anyone has the same situation or advice to this..

The Guest OS / Host OS CPUUtilization inconsistency

Our customer have their Citrix Metaframe XP 1.0 server (on Windows 2000 Server)

P2V to ESX 4.0 The physical machine is IBM x3650 M2 (2CPU Quad Core), and each VM Guest OS assigned 4 vCPUs in it.

Citrix Guest OS had a CPU utilization of 90% Usage on vCenter

Citrix Guest OS had a CPU utilization of 25-35% Usage on it's own Windows Task Manager and Windows Performance Monitor

Our Customer had ported their Citrix Server to XenServer and has a difference about only 10% .

Some rumors said that…”Upgrade to ESX 4.1 will solve this inconsistency” Is it true?

So far I have not see any post that mention about it.

Does anyone has advise to solve this issue?

[Scissor]

Does anyone has advise to solve this issue?

Try reducing the number of vCPUs allocated to each Citrix Guest from 4 to 2 and test again. How many Guests are you running on this Host?

Some notes:

- http://www.vmworld.com/docs/DOC-2763

- http://virtrix.blogspot.com/2007/03/vmware-best-practices-for-deploying.html

[JimmyParity]

Hi Scissor

They did reduce the number of vCPUs

Originally The CPU Utilization of ESX Host is approximately 100% and AP Hangs.

From 4 to 2 The Utilization of that VM decrease ,the Host CPU Utilization decrease to around 50%

From 2 to 1 The Utilization of that VM decrease ,the Host CPU Utilization decrease to around 25%

This is information from our customer.

But why less CPU is better? and affect all the Physical machine.? anyone know the methodology?

Thank you