Proxmox reserved resouces for self

[thoralf]

Sometimes I run into the situation that the guests are consuming so many resources (mostly CPU or IO) that the host itself is running into issues and is not able to maintain its job.
This is rare but a problem.

Is there any way to ensure that the host itself has priority over any guest at any given time?

 

[LnxBil]

Is there any way to ensure that the host itself has priority over any guest at any given time?

Short: No.

Long: Each VM is a process on the host with the user root so that all processes share the same user (the one with the highest permissions) and are scheduled equally. You can give the OS users more resources, yet I/O is not that easy to schedule. Best to use distinct devices for data and OS in such problem scenarios so that the I/O of the VMs does not interfere with I/O from the VMs. It's even more complicated if you consider memory, swapping etc.