I wrote a script to simulate a variable workload when the load averages dipped so that I could keep my mostly-idle VMs running. It felt like a waste of energy but the VMs are in short supply which meant that Oracle has already decided that their servers will generate heat regardless of my actions: if I wasn't burning enough CPU cycles they would find someone who would.

Load average of ~30% per core seems to have been enough to repel the elephants.