LXC and VM Resource management

[LodgedDrip]

Good Afternoon,

I'm trying to find out a bit more about how Proxmox manages the resource management when running containers and VMs on the same HV.

I've got a six+ node (48 Core, 64G each) PVE cluster with a range of VMs on it at the moment, however, I need to deploy an application which runs as a single systemd service so a whole VM just to do this is a bit overkill.

How does Proxmox handle running VMs (2/3 'beefy' ones given their nature) and then possible 10+ containers (1 core, 2G) each on the same node? what happens to resource usage across the two types, any priorities, what if usage spikes on an instance or VM etc? or would it just be recommended to only have one type per HV? so an HV for containers, one for VMs etc?

 

[LodgedDrip]

Is anyone able to advise on the above, please?

 

[dcsapak]

mixing vms/containers is not a problem and quite typical i'd say

so basically the only balancing is done by the kernel regarding threads/cpu

vms are started as a (multithreaded) single process, while containers are a group of normal processes (managed by the host kernel)

you can play with the 'cpu limit' and 'cpu units' options (the first limits the overall cpu use, and the second weights them relatively to each other)