To quote from Metalink note: 249212.1:

"Oracle has not certified any of its products on VMware virtualized environments. Oracle Support will assist customers running Oracle products on VMware in the following manner: Oracle will only provide support for issues that either are known to occur on the native OS, or can be demonstrated not to be as a result of running on VMware. "

"If a problem is a known Oracle issue, Oracle support will recommend the appropriate solution on the native OS. If that solution does not work in the VMware virtualized environment, the customer will be referred to VMware
for support. When the customer can demonstrate that the Oracle solution does not work when running on the native OS, Oracle will resume support, including logging a bug with Oracle Development for investigation if required."

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I hope Oracle will change their position - many organisations won't consider OVM as their primary virtualisation platform as they have to support a wide range of technologies not just Oracle. I have been running test Oracle environments (mainly app server/middleware) for nearly 3 years on VMware (Server, ESX, ESXi) without any VMware-specific problems and still had good support from Oracle, though of course you wouldn't want to take this risk in production as Oracle Support will have a "get out" clause. If you are wanting to run Oracle on VMware as part of a modern, efficient IT platform I suggest you keep putting pressure on your Oracle account manager!

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