I am baffled by the issues I am having. I have a Windows VM using a .raw as the boot. Display is spice, it has 12 cores allocated to it and 24GB of RAM (Ballooning enabled min 6GB). Not always, but it does happen more and more frequently, the host will just stop and slow down, I can click stuff...
I have bad performances on my server since several days. mysql requests are very slow, even my vm backups are twice longer. However the resources are not saturated.
I checked proxmox performances with pveperf and I had the following results :
CPU BOGOMIPS: 55998.56
Today I try to recover VM from achive and get a huge IO delay on PVE node.
Before that, everything was fine.
I noticed the following: when "space reduction due to 4K zero blocks" at end of the recovery report is great enough, I get huge IO delay.
For example, when I recover this arhive...