When you apply the patch, you apply the patch to the binaries of the Primary first, then to the binaries of the standby. Then you do "Post-Installation" task for the databases on the Primary. You do not apply any post-installation task on the standby. Ram Srinivasan On Tue, Jul 27, 2010 at 9:35 AM, Ray Stell <stellr@xxxxxxxxxx> wrote: > 813445.1 says to apply cpu to primary first. > 278641.1 says to apply cpu to standby first. > Maybe it doesn't matter. Thoughts? > -- > //www.freelists.org/webpage/oracle-l > > > -- Sincerely Ram Srinivasan