GRP

AutoUpgrade and the COMPATIBLE parameter

Posted on March 18, 2020 by AutoUpgrade 2

Several times I’ve got asked by customers if AutoUpgrade does change the COMPATIBLE parameter. So let me explain what happens to COMPATIBLE when you upgrade. And give you also some hints about AutoUpgrade and the COMPATIBLE parameter.

AutoUpgrade and the COMPATIBLE parameter

Photo by Ivana Cajina on Unsplash

Does AutoUpgrade change COMPATIBLE?

No. Clearly, AutoUpgrade does not change the COMPATIBLE parameter for several reasons. At first, we recommend to not change the COMPATIBLE parameter right after the upgrade if you can afford another downtime soon after. By keeping COMPATIBLE on the previous (before upgrade) value, you have the choice to revert back to the previous …

Continue reading...

Database Migration from non-CDB to PDB – The Fallback Challenge

Posted on August 5, 2019 by Fallback Single-/Multitenant 2

There are several pitfalls when you plugin a non-CDB into a CDB environment. I’d like to highlight some of them – and show you potential workarounds as well. This is part of a series of blog posts to make your migration from non-CDB to PDB a bit smoother.

Database Migration from non-CDB to PDB - The Fallback Challenge

Photo by Sebastian Grochowicz on Unsplash

Database Migration from non-CDB to PDB – The Fallback Challenge

As I work with customers on upgrades and migrations for a very long time, I know how important a proper fallback is.

When you attempt a migration from a non-CDB to PDB, you need to plan …

Continue reading...

Guaranteed Restore Points and COMPATIBLE parameter

Posted on April 12, 2018 by Fallback 12

Guaranteed Restore Points and COMPATIBLE parameterA while ago I blogged about Fallback Strategy: Flashback Database to Guaranteed Restore Points. I included a recommendation that you must not change the COMPATIBLE setting. But I should have been a bit more clear and precise about Guaranteed Restore Points and COMPATIBLE parameter settings.

Guaranteed Restore Points and COMPATIBLE parameter

First of all, you can’t use FLASHBACK DATABASE to a Guaranteed Restore Point when you changed to COMPATIBLE parameter. This was a common pitfall in older Oracle releases.

But with Oracle Database 12.2.0.1 we add a tiny change which prevents you from accidentally changing COMPATIBLE while your fallback …

Continue reading...

Fallback Strategy: Flashback Pluggable Database

Posted on August 30, 2017 by Fallback Single-/Multitenant 6

Fallback Strategy: Flashback Pluggable Database in Oracle 12.2Since Oracle Database 12.2 an important feature works now for pluggable databases as a Fallback Strategy: Flashback Pluggable Database in Oracle 12.2. This was missing in Oracle Database 12.1.

Actually I missed this feature a lot as I use “Flashback” almost everyday. And you could only rewind the entire deployment with a FLASHBACK DATABASE command.

Fallback Strategy: Flashback Pluggable Database

Fallback Strategy: Flashback Pluggable Database in Oracle 12.2Actually having the possibility to flashback a pluggable database without effecting the other PDBs is really important. Did you ever want to try out what happens if you TRUNCATE TABLE SYS.PROPS$? Give it a try – but set a …

Continue reading...

Fallback Strategy: Flashback to Guaranteed Restore Points

Posted on August 29, 2017 by Fallback 39

Fallback Strategy: Flashback to Guaranteed Restore PointsYou can attempt an Oracle database upgrade without having a fallback strategy. Of course you can. If you are brave enough. But I would recommend you this Fallback Strategy: Flashback to Guaranteed Restore Points. It is simple, easy, fast. And yes, it is an Enterprise Edition only feature. I have blogged about it in the past already but I realized it need some refresh.

Fallback Strategy: Flashback to Guaranteed Restore Points

One of the fastest way to revert from a big change (i.e. a database upgrade, an application upgrade, etc) is Flashback Database to a previously created Guaranted Restore Point.…

Continue reading...
Mike Dietrich
Oracle Senior Director of Product Manager for Database Upgrade, Migrations and Patching writing just another blog.

Opinions certainly are my own as is this page.

Archives

Categories

Upgrade @YouTube

Subscribe via Email

Join 7,849 other subscribers

Follow me on Twitter