Out Of Place

Can I apply an RU to a home with an MRP?

Posted on September 2, 2026 by Mike.Dietrich Patch Recommendation 0

This question came up by a customer, and it was referring to the FAQ MOS note for MRPs. In brief, it was stated that you could apply a higher RU into a home where an MRP up to MRP3 had been installed in the previous home. So the question raised to me was: Can I apply an RU to a home with an MRP as it was mentioned in the FAQ document?

Can I apply an RU to a home with an MRP?

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Which note, and what’s the statement?

The FAQ2283 – Introducing Monthly Recommended Patches (MRPs) and FAQ stated the following under Q18:

Q18:

How to rollback an MRP

You know, I am not a fan of in-place patching. Actually, I think everyone should always patch out-of-place. But I know that for instance EBS with a 19c database requires in-place patching, and out-of-place will be supported only with 26ai for EBS. Therefore, in relation to an exercise I did over the weekend, let me share how to rollback an MRP.

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What is an MRP?

Very briefly, it stands for Monthly Recommended Patch – thus MRP. And it co-exists with CSPUs. I described the difference here. Read more if you are interested.

CPU, CSPU,

datapatch stores rollback patching files in the database

Posted on January 17, 2024 by Mike.Dietrich Patch Recommendation 29

I held back this blog post for a longer while. A customer (Thanks Jannes!) reported this to me many months ago but the fix was not as trivial as we thought initially, and there were several unlucky circumstances delaying it multiple times. But now it is time to tell you how datapatch stores rollback patching files in the database. And of course, how to cleanup.

datapatch stores rollback patching files in the database

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Why is this important?

At first, you may ask yourself: Why should I care? And you are right. This is normally nothing you should care about. …

The downsides of in-place patching – and a patching lab

Posted on January 10, 2024 by Mike.Dietrich Best Practice Patch Recommendation 40

Happy New Year to all of you at first. I hope you all had a good start – and for myself, I promise to blog a bit more again in 2024. Let me start with my first post since I received a question very often: Why should I patch out-of-place with a new Oracle Home? Since I need to patch a bit today I can easily show the downsides of in-place patching – and a patching lab.

The downsides of in-place patching - and a patching lab

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It all started at OCW 2023

Ok, we didn’t really start it at OCW 2023 in …

Patching to Oracle 19.19.0 out-of-place with additional patches

Posted on May 23, 2023 by Mike.Dietrich AutoUpgrade Patch Recommendation 94

From all my quarterly blog posts you know that I patch usually in-place for space and other reasons. And you may have similar reasons when you patch. But it is not ideal – and just speaking about risk and downtime, you should always patch out-of-place. So let me show you how Patching to Oracle 19.19.0 out-of-place with additional patches works.

Patching to Oracle 19.19.0 out-of-place with additional patches

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What do I need?

Actually, this is not complicated at all. And if you never done it this way, give it a try now please.

Base release Oracle Database 19.3.0 image
opatch 37 from

Some additional information regarding the Oracle 19.14.0 RUs

Posted on January 27, 2022 by Mike.Dietrich Patch Recommendation 27

You may have read my previous blog post about patching all my environments to the January 2022 patch bundles. But since I do this in a very simple non-RAC, non-GI environment, I may not see issues you may have encountered. Some people commented – and I would like to share Some additional information regarding the Oracle 19.14.0 RUs . Still, please, this is NOT a collection of all open issues. I just see this blog post as a summary of the issues I have seen and/or heard about so far.

Some additional information regarding the Oracle 19.14.0 RUs

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555.1 is one

DBMS_OPTIM_BUNDLE and Out-Of-Place Patching

Posted on August 12, 2021 by Mike.Dietrich Flaws and Pitfalls Optimizer Patch Recommendation 10

Well, you see, this is most likely my special DBMS_OPTIM_BUNDLE week. And since I receive quite a number of questions, it may be good to discuss here about DBMS_OPTIM_BUNDLE and Out-Of-Place Patching?

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Out-of-place Patching

When you patch out-of-place with a new home – which is clearly our recommendation – you may see another tiny pitfall with DBMS_OPTIM_BUNDLE.

When you check DBA_DIRECTORIES, you will find two directories being related to DBMS_OPTIM_BUNDLE.

SQL> select directory_name, directory_path from dba_directories where directory_name like '%OPTIM%'

DIRECTORY_NAME	     DIRECTORY_PATH
-------------------- --------------------------------------------------
DBMS_OPTIM_LOGDIR    /u01/app/oracle/product/19/cfgtoollogs
DBMS_OPTIM_ADMINDIR  /u01/app/oracle/product/19/rdbms/admin

You see the “19” in the …

Out Of Place

Can I apply an RU to a home with an MRP?

Which note, and what’s the statement?

How to rollback an MRP

What is an MRP?

datapatch stores rollback patching files in the database

Why is this important?

The downsides of in-place patching – and a patching lab

It all started at OCW 2023

Patching to Oracle 19.19.0 out-of-place with additional patches

What do I need?

Some additional information regarding the Oracle 19.14.0 RUs

555.1 is one

DBMS_OPTIM_BUNDLE and Out-Of-Place Patching

Out-of-place Patching

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