I came to the same conclusion. Fine for test and development, not so good for a live box. Still, Ron did indicate that they would be using ESX server on production, so that would remove the host OS from the equation and speed things up a bit. Out of curiosity Ron, what VMWare product were you using in your testing? On 1/3/07 3:23 PM, Carlson, Todd wrote: > We looked into Oracle on VMware and came to the conclusion that it wasn¹t a > good idea for performance reasons. VMware adds an additional and slow IO layer > between oracle and the platters: VMware -> OS -> LVM -> Disk. As a result, IO > performance is not good. We do use this setup for development and test > databases where performance is not important. --------------- Jason Heinrich Oracle Database Administrator Pensacola Christian College (850) 478-8496 x2509 jheinrich@xxxxxxxx