One of the sites that I support has asked me to spec out new production and dev/qa database servers. They are currently running Windows. On the production server they expect to have 15 or 16 small Oracle instances with a total SGA+PGA of 35 gb. About half of their instances are at 11.1 but they well be eventually upgrading all of them to 11.2. If we go with Windows for the new servers we will be running Windows Server 2008r2 64 bit. I would, obviously like to move them to Linux, but I expect that they will resist the idea. Are we going to run into any absolute or practical limits running 15 or 16 Oracle instances with 35 gb of memory on a Windows server? Thanks, Peter Schauss -- //www.freelists.org/webpage/oracle-l