Oracle Configuration : Oracle Patches
Patch Set Updates versus Bundle Patch
As PSUs and BPs, each are cumulative you’ll get the fixes from all previous PSUs or BPs for the same release included as well. The PSU a quarter later has new security fixes and new regression fixes added, the Bundle Patch in addition gets new optimizer and functional fixes and of course the same new security and regression fixes the PSU has gotten.
- A Patch Set Update (PSU) contains usually security fixes and regression fixes, i.e. bug fixes.
- A Proactive Bundle Patch (BP) was a superset of a PSU containing the PSU but optimizer fixes and functional fixes which may be sometimes feature extensions as well.