Additional info on GoogleBot for Linux bases systems.
We used 'top' to determine greediest processes, the googlebot was steady at 90+percent. We then ran ss -p | grep 'PID' to get the ip address which we then looked up with whatsmyip.org.
Ooops, the bots seem to have come back. We blocked google inbound at the firewall (66.249.64.0/19) to our moodle server.
Chris