Sorry, doesn't work for me... I have to keep another system around just to confirm issues on? That costs a bunch and will significantly slow down analysis... maybe your customers are less risk averse than mine, but there's just no way mine would go for that.

...and yes, Oracle _only_ recognise an x86 VM as a hard partition for licensing if you use OracleVM (i.e. give _all_ your money to Oracle!), so I have to license all the cores on my x86 server, whether I need them or not

- the (obvious) result of this is lots of smaller servers to run individual databases, which a) creates a management headache and b) isolates unused compute resource

so whilst I can see a strong case for what you discuss on a "per project" basis, when I think about this across my customer's multiple datacentres with Oracle instances measured in the hundreds, I can't see how this would stack up.

Duncan