Just an update, moved all VM's off one of the boxes, and with nothing running, still getting abnormally high io wait. Tonight I am going to do a fresh install on one box, and if that doesn't work I will try a new drive.
I am at a loss. I have 3 proxmox servers, all with identical hardware.
Each of them has been in service since April 2022. They are not clustered together.
Each of them started experiencing this issue at exactly 00:01am on January 1st 2023.
The average IO wait / IO delay has skyrocketed from...
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