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

[Milan Zamazal]

"Luca 'remix_tj' Lorenzetto" <lorenzetto.luca at gmail.com> writes:

> 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.

[...]

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

This is normal with memory balloon enabled – memory balloon often
"consumes" the hot plugged memory, so you can't see it.

Regards,
Milan