lag spike

Hi, my problem is when i upload large files to nextcloud (AIO) on VM or make copy of VM my I/O jump to 50% and some of VM became unresponsive eg websites stop working on VM on nextcloud, Windows Server stop responding and proxmox interface timeout. Something like coping VM can be understandable...

Hello all, I just got a (new*) dell poweredge r630 for a virtualization station and was looking for a good software to run on it. I heard about how great Proxmox is and the great community behind it so I gave it a try. I installed it. Specs (not the most impressive I know, and older hardware...