I have a questions about the Vmware ESXi 4.0 memory and virtual machine memory allocation

Posted on 2011-10-12
Medium Priority
Last Modified: 2012-06-21
Time                      Balloon      Active            Granted       Consumed
10/12/2011 1:44:00 PM      0      16051200      16896000      16888220
10/12/2011 1:44:20 PM      0      15882240      16896000      16888228
10/12/2011 1:44:40 PM      0      15882240      16896000      16888228
10/12/2011 1:45:00 PM      0      15882240      16896000      16888232

I have 3 virtual machines that when I look at the Virtual Macines list the "guest memory" shows a value in between  97-99 % for all 3 machines  (It shows that it's in the red)
Above is the Memory report for one of the Virtual Machines, should the value of "granted and consumed be so close in value?  The "host memory" allocated for the above virtual machine is 16718 mb.  Can someone help me pin point if I might possibly have a problem?  Thank you in advance for your help!!
Question by:Lamrski
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LVL 126
ID: 36959272
Active memory is is what the VMkernel believes is currently being actively used by the VM.

This is the value to watch for capacity planning.

So Active Memory in the VMs is approx 15GB, where you've allocated 16GB, so that's why you have a memory alert.

But what are the VMs, what's the baseline, and is this usual?

What are the servers, SQL, Terminal Servers, Citrix?

Author Comment

ID: 36959280
The VM with data listed above is our main  exchange server.   The other 2 which are giving alerts are another exchange server and our only domain controller..  I am new here, therefore I do know what the baseline should be.

Expert Comment

ID: 36959297

... may help.

Active is the amount of memory the VM is actively using.
Granted the total amount of memory the VM has been given/assigned.

Consumed is the total amount of memory the Host is using for the VM.

By the looks of it, your VMs are running near max memory utilization.  I've seen SQL servers do that without side effects.

Are you noticing any performance issues within the VM?
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LVL 126
ID: 36959302
Consumed Host Memory is the amount of physical memory that has been allocated to the virtual machine.

Okay, so you've allocated out 16GB of memory to your Exchange Servers, and at present they are using a fair proportion of that memory, e.g. 15GB, I would look at the performance chart history, and see if this is just today, of has this been like it for the last week or month.

If this is regular, I would be inclined at the next maintenance Window to maybe increase the memory to the virtual machine.

But check the Exchange Server, no one is logged on interaccftively, running flash, applications, Virus Scanners etc
LVL 126
ID: 36959306
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If you want a quick tool, to help you with wanting to know all the individual elements, then I would suggest using Veeam Monitor Free Edition

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More features


Identify memory bottlenecks and remove: Memory Performance Analysis and Monitoring

Do not worry yourself with Granted or Consumed.

Watch the Active Value.

Author Comment

ID: 36959341
This may be a dumb question but where do I find at the "performance chart history"...I'm new to VMware as well?  Thank you for your help!!!
LVL 126

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE^2) earned 1500 total points
ID: 36959351
Select the Virtual Machine, and click the Performance Tab, and select the charts you require

Author Closing Comment

ID: 37064341
I had to drop this topic  .. But I really appreciate the help

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