After power cut IO Delay has reduced

[drjaymz@]

One of our datacentres had a power outage but the proxmox mode was not shutdown before the power was lost. There has been some updates applies a few weeks ago to take it to 7.2.3.
After the restart the IO delay has reduced - which sounds like a good thing.

Is this expected and is there something in recent updates that might explain this?

Performance doesn't seem any worse or better than before the power outage. I am assuming that a reboot is necessary for some updates to take effect.

 

[dcsapak]

kernel update require a reboot to take effect, and if we changed some default or qemu version changed, the vm processes need to be restarted to take effect (which can also happen without reboot of course if you stop & start the vm)