I've heard the argument before about having more than one instance on a machine is a bad idea. However, on the flip side, having 50 applications share one instance can be bad, as if one app needs a particular patch, you're affecting 49 other applications due to one application's requirements. Anyone care to elaborate why more than one instance is bad? --Tom On Thu, 30 Mar 2006, David Sharples wrote: > by joining them into a single instance - that is best practise > -- //www.freelists.org/webpage/oracle-l