Hi,
I do not have any background on VMware technologies, but we are using a dynamic cloud installation based on vCloud Director at the company where I work.
The group which operates the server advertises the service offering with a "pay per use model".
This is true for CPU resources, as we pay only what we use during the month. But in my opinion this does not hold for RAM usage.
We have Linux VMs which allocate 4GB of "physical" RAM and our monthly bills show that the RAM usage is up to 100% for the whole month. But when you look at memory tools of the VM you can see that most of the time 50% or even less is used by the guest OS processes.
That means from a user point of view the RAM price per month should be half of what we are charged right now. Asking the operators about the "issue", we always get the response that RAM usage is not dynamic and we need to pay for the 100% usage from the host server's point of view.
Could someone share some light on this topic? Is there really no way to make RAM usage as dynamic as CPU usage?
Thanks,
Michael