Thinking about this a bit more, I wouldn't be surprised if the Spectre/Meltdown security mess played a role here, too.
One of the ways to mitigate this CPU vulnerability involves turning off predictive instruction pre-fetching. A machine, or a virtualization, might suddenly lose as much as 40% of capacity as the patch is applied. More hardware is then needed to get the same job done, and so plenty of pain to spread around.
One of the ways to mitigate this CPU vulnerability involves turning off predictive instruction pre-fetching. A machine, or a virtualization, might suddenly lose as much as 40% of capacity as the patch is applied. More hardware is then needed to get the same job done, and so plenty of pain to spread around.