Hi! I just setup Proxmox for my home server last week.
Here is my setup with relevant info before I jump into the problem
Note: everything is isolated because I've been trying to debug for the past week.
Computer: 16gb memory
VM for Plex: 4gb memory
VM for NZBGet+Sonarr+Radarr: 4gb memory
VM for Samba: 1gb memory
Container for Ombi: 512mb memory
The Problem
About once a day, the Plex VM crashes. It is consistently the Plex VM and when I try to start it back up Proxmox will then say "Cannot allocate memory". Here's where it get's a bit weird. The last time this happend (just now) Proxmox said 13gb of 16gb were used, top on the host said similar (only 3gb free), but each of the VMs/container showed normal memory usage. This is making it very hard to debug/isolate the problem.
My Temporary Fix
I ran this command I found on reddit and the memory immediately freed up and I could start the VM:
But I have no idea what that does
Here are some questions I think might help lead to the answer"
Here is my setup with relevant info before I jump into the problem
Note: everything is isolated because I've been trying to debug for the past week.
Computer: 16gb memory
VM for Plex: 4gb memory
VM for NZBGet+Sonarr+Radarr: 4gb memory
VM for Samba: 1gb memory
Container for Ombi: 512mb memory
The Problem
About once a day, the Plex VM crashes. It is consistently the Plex VM and when I try to start it back up Proxmox will then say "Cannot allocate memory". Here's where it get's a bit weird. The last time this happend (just now) Proxmox said 13gb of 16gb were used, top on the host said similar (only 3gb free), but each of the VMs/container showed normal memory usage. This is making it very hard to debug/isolate the problem.
My Temporary Fix
I ran this command I found on reddit and the memory immediately freed up and I could start the VM:
Code:
free && sync && echo 3 > /proc/sys/vm/drop_caches && freeBut I have no idea what that does
Here are some questions I think might help lead to the answer"
- What are some ways I can monitor the machine and see exactly which processes/vms are taking up all the memory?
- Could it possibly be a memory leak from something other than Plex? If so why would that be the VM that ALWAYS crashes?
- Maybe there is a leak in my NZBGet+Sonarr+Radarr VM and Plex always crashes because it is the only other VM asking for 4gb?
