I worked for a company a few years ago that fell foul to this, I wasn't privy to the exact details, but it was explained to me that Oracle did an audit and foun

I worked for a company a few years ago that fell foul to this, I wasn't privy to the exact details, but it was explained to me that Oracle did an audit and found the company were using the database on more cores than licensed for or maybe something like the VMWare situation. To "make good" the company were offered the option to buy two Exadata racks and support contract at a very high cost, which they took up, and meant I had to spend a good few months migrating all of our applications over to the new Exadata database.