I have to say I still don't like this note. How many of you are running on HP kit (Linux or Windows)? A fair few one imagines. Oracle hasn't certified any of it's products on HP hardware either (well except v1 of the db machine). But when you log a support call for a new issue (i.e one that doesn't come up in a metalink search) Oracle support don't say "Sorry that's an unkown issue, please refer to HP support or reproduce it on SUN kit". Instead they work the issue and if it looks like a hardware issue, then they will suggest involving the hardware vendor. As it happens I'm working an issue with support right now re warehouse builder. Oracle support very quickly offered the following "solution" Solution Offered : Don't run OWB on VMWare. It's taken a week to convince the analyst to work the case. (I think it was the working instance of OWB on the same machine that did it:) ). Niall Litchfield On Thu, Nov 18, 2010 at 3:40 PM, Li Li <litanli@xxxxxxxxx> wrote: this is a metalink note stating oracle's support position: Oracle has not certified any of its products on VMware. For Oracle RAC, Oracle will only accept Service Requests as described in this note on Oracle RAC 11.2.0.2 and later releases. Support Position for Oracle Products Running on VMWare Virtualized Environments [ID 249212.1] -- //www.freelists.org/webpage/oracle-l -- Niall Litchfield Oracle DBA http://www.orawin.info