Installing PSU (GI+RAC+JVM)

I’ve installed quite a few PSUs in my professional life, but this time, it was something else. I’m talking about a RAC environment with 2 nodes and a database containing JVM, so this was a complex patch to begin with. The problem is the the readme is incomplete and on top of that I ran into a few issues (some I could find on MOS but some I couldn’t). I’m writing this to assist anyone who needs to install this patch by providing the steps that worked for me. Please note that I patched 12.1.0.2 home, for other versions the steps might be a bit different.

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Oracle New Version Numbering

Oracle is using the same numbering scheme since I’ve started working with it (7.2). The 5 number scheme with the release number, patchset and PSU is quite confusing and the post I wrote about that (here) is still very popular.

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Optimizer Changes After Upgrades

When Oracle releases a new version or even a petchset, sometimes they change the default value of initialization parameters or add new features and introducing new parameters with them. These changes affect the behavior of many components. In this post I’d like to address how I deal with parameter of features changing optimizer behavior. Continue reading