No it is not widespread. Underprovisioning is a bit of a dirty word too - it breaks isolation.
The Google Borg paper says they use non production batch jobs to eat the spare, so you can kill them if necessary. Cloud providers could offer this as a service in theory, although they are not really architected that way.
The Google Borg paper says they use non production batch jobs to eat the spare, so you can kill them if necessary. Cloud providers could offer this as a service in theory, although they are not really architected that way.