We currently have three vsphere 4.0 hosts, each has 4 x X7460 processors and 148gb of RAM running on IBM x3950 M2 servers. We plan on adding three new hosts to our environment and upgrading everything to the latest version of Vcenter and Vsphere. As part of my project I'm trying to take some performance stats to show a before and after and I've noticed the performance is not great. The servers are not saturated and disk is fine, specifically the passmark score on memory and CPU are poor. The OS is windows 2008R2 in the VM and it has not been tuned, it's a straight install. Changing the memory and cpu shares between low, med and high seem to make little or no difference.
When I configure a windows 2008 R2 VM with 2 vcpu's and 4gb of RAM I see the following passmark's scores on average:
CPU - 1400
Memory - 234
Disk - 3800
As you can see disk looks good and the other two are terrible. Are there any tips you can give me or directions to look in to improve this? I've read a number of Vmware whitepapers but the numbers are so low I think it must be something obvious. The VM in question is not doing anything and has no virus scanner.
Thank you for any help you can offer!
Matt