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I don't think everything should be virtualized. Virtualization means complexity in management for high performance applications, like database servers. Yes with enough effort you can get the performance you want but it is a lot of effort to go to and for very little benefit.

Chris when you say that there is little benefit vs. effort for high performance applications such as databases, are referring to the traditional virtualization objectives focused around consolidation, reducing hardware and so forth? Of are you also reffering to little benefit from having agility to move applications from one fast server to another for maintenance, HA, BC, DR, etc..? Granted that there are costs in terms of licesening and in some cases hardware, not to mention new skillsets and training for those that do not currently exist. Curious to hear more on your thinking in terms of what lack of benefits or also additional complexities. thks in advance.