Hi,
Most of our VMs are SLES SP15 and also few are CentOS 7. But the problem looks to be same
for any type of VM.
Today, I tried to clear the "buff/cache" memory manually for one of the VM using
"sync; echo 3 > /proc/sys/vm/drop_caches" linux command and then I noticed in
ovirt GUI that VM's memory usage dropped to 54% from 98%.
So, it is clear that ovirt is not considering the actual "available" memory but
is considering "free" + "buff/cache" and is reporting the same in
ovirt GUI as memory usage %.
Isn't this a bug?
/Kishore