I was having this strange issue, where a running busy VM stopeed all of a sudden due to high CPU or Memory overload issue. So manually had to start everythime. In order to avoid this, created a small script to start the VM in case if it’s down.

#!/bin/bash

# Set environment
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

su -

if [[ $(qm status 101) = *"status: stopped"* ]];
then
echo `qm start 101`
fi