When running Oracle databases on UNIX or Linux, it is easy to install a new Oracle Home without an outage.  The work can be done during working hours, long before any change window or outage to existing databases and applications.  The switch to a the new Oracle Home is also straight forward.

However, on Windows, there are a number of considerations for a cautious DBA, and a longer outage for upgrades may be unavoidable.

I’ve written some brief notes, based on my experience patching 11.2.0.1 to 11.2.0.4.21 on Windows Server 2008: Patching/Upgrading Oracle On Windows

 

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