VCenter reports one memory reading while the Server reports another

patriots
patriots used Ask the Experts™
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We have an odd situation that may simply be due to our own noobness with VMware.  We have a virtual server running in a virtual host that shows in VCenter that it is consuming nearly 8 GB of RAM.  But when we RDP into this Windows Server 2008 R2 server, task manager shows the OS is only using 2 GB of RAM.  What's with the discrepancy?  Also, can someone point us to a good performance tuning guide for Windows File servers running in vsphere4?
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Paul SolovyovskySenior IT Advisor
Top Expert 2008

Commented:
I would normallly trust the vCenter since it's actually telling what it's running from the physical hardware.  Can you provide a little more information.

1.  What hardware are you running with which CPU
2.  How many virtual CPUs do you have on it?
3.  What version of vCenter and ESX and what update.

Author

Commented:
DL380 G6 dual Quad 2.5 Procs 32GB of RAM
5 total vm's running in this host, 19 GB of the 32 GB used, only 700 MHz being used
ESXi 4
VCenter4

The file server does have the vmware tools installed
Top Expert 2009

Commented:
How do you provisioned physical ram to each VM?
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Senior IT Advisor
Top Expert 2008
Commented:
Try this:

1.  Make sure the VMs are not using more than 2 vCPUs

If you're still having an issues go to configuration and disable TSP by doing the following

Mem.AllocGuestLargePage  set to 0 on the host->MEM->Mem.AllocGuestLargePage  set to 0

Author

Commented:
where is this setting?
Mem.AllocGuestLargePage  set to 0 on the host->MEM->Mem.AllocGuestLargePage  set to 0

Is this in the VM, or in the host?

Author

Commented:
sorry, I see host now...

Author

Commented:
would the host need to be restarted?
Paul SolovyovskySenior IT Advisor
Top Expert 2008

Commented:
yes

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