Hi!
We've been trying to understand what the effect of increasing NumOfPciExpressPorts
might be in terms of system resources consumption and overall system performance of the
oVirt Hosts.
In this specific scenario, we're running an oVirt deployment with about 100 hosts and
thousands of VMs.
oVirt allocates 16 PCIe ports by default (or is it QEMU defaults?) and we would like to
increase that number to about 30.
However, only very few VMs are actually gonna use those extra PCIe ports in terms of
having additional devices (like NICs).
So, basically, there will be a lot of VMs that have about twice as many PCIe ports
available to them than now but not really using them (as in having actual additional
devices created and associated with the VMs).
How is that going to impact physical servers that are running the VMs? Any potential
problems for the VMs themselves?
Ivan
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