[ovirt-users] Hot Memory add and Physical Memory guaranteed

[Luca 'remix_tj' Lorenzetto]

On Thu, Jun 22, 2017 at 6:21 PM, Luca 'remix_tj' Lorenzetto
<lorenzetto.luca at gmail.com> wrote:
> Hello,
>
> i just tested the memory hot add to a vm. This vm had 2048 MB. I set
> the new memory to 2662 MB.
> I logged into the vm and i've seen that hasn't been any memory change,
> even if i said to the manager to apply memory expansion immediately.
>
> Memory shown by free -m is 1772 MB.
>
> Looking around i've found that that value was set in the option called
> "Physical Memory guaranteed".
>
> I tried setting this parameter to an higher value, but is still
> showing 1772, even if it says that "Memory" parameter will be changed
> immediately and minAllocatedMemory is changed at next boot.
>
> What is the right workflow to hot increase the ram of a vm?
>

forgot to say that is a RHEL 7 VM and has the memory baloon device enabled.

I tried on a RHEL 6 that has no memory baloon device and the ram has
been immediately increased.

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Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <lorenzetto.luca at gmail.com>