I've observed that oVirt considers cache/buffer memory as "used". So a host can report, for example, 10% memory utilisation when hosting 0 VMs. A reboot of the host will of course free all that memory and the host will again report something close to 0%.

This caused me a shock a few weeks ago when I thought my cluster was running out of memory.

Given that the kernel will give back the buffer memory as required, is it not perhaps a bit misleading to count it as "used"?


---- On Fri, 13 Mar 2020 17:47:34 +0000 Michal Skrivanek <michal.skrivanek@redhat.com> wrote ----

> On 10 Mar 2020, at 15:46, Noua TOUKOUROU <noua.toukourou@uni.lu> wrote:
>
> 
> Hi,
>
> My ovirt engine is showing wrong host's memory usage. Even when this one has no VM.
> How to fix it ?

What’s wrong with it?

>
> Thanks
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