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Don Burleson Blog 







Oracle patch set update (PSU) tips

Oracle Database Tips by Donald BurlesonApril 28, 2015

As of 14 July 2015, Oracle is now introducing a new method for patching, patch set updates, or PSU.  According to MOSC notes 854428.1 and 850471.1, Oracle PSU is a new patching strategy whereby the DBA can choose only "recommended" and "proactive" patches, instead of all of the patches in a quarterly Critical Patch Update (CPU).

An Oracle PSU contains recommended bug fixes and "proactive" cumulative patches, a nice change that makes it simple for the DBA to chose to apply "priority" patches.

Starting each quarter, Oracle Critical Patch Updates (CPU) will now contain both the PSU and CPU, so the DBA may choose to apply just the CPU or apply all patches in the PSU patch bundle (which includes additional fixes).

The naming conventions for CPU and PSU is the last-order digit, so it's easy to see of you are patching with CPU or PSU:


Also, the PSU supports Oracle's zero-downtime patching, a method for RAC databases whereby each node is patched independently with no downtime.

Oracle Patch Set Update (PSU) Details:

- Note that  OPATCH is required for installation of PSU

- MOSC Note 850471.1 - Oracle Announces First Patch Set Update For Oracle Database Release 10.2

- MOSC Note 854428.1 - Introduction to Oracle Patch Set Updates (PSU)

First PSU release notes:

- MOSC Note 8576156.8 - Bug 8576156 Patch Set Update (PSU)

- MOSC Note 854473.1 - Known Issues with this Patch Set Update


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