Grid Infrastructure

Are there security fixes included? Which CVEs?

I received multiple questions from colleagues and customers over the past weeks regarding the security content in RUs and MRPs. See also my blog post from yesterday where I touched this topic briefly. The question regarding RUs, MRPS and CSPUs often is: Are there security fixes included? Which CVEs?

Are there security fixes included? Which CVEs?

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Release Updates are the primary vehicle

As I explained already, Release Updates (RU) are the primary and main vehicle to deliver security fixes. MRPs and CSPUs contain only a smaller portion, usually those fixes with really high CVE scores which can’t wait until …

GI 19.31 and 19.32: trace file flooding in mgmtca.trc can happen

Posted on September 4, 2026 by Mike.Dietrich ASM / RAC / GI Flaws and Pitfalls Oracle Database 19c 4

Thanks to Peter Lehmann who always alerts me about findings and encounters he had in his test and production RAC cluster environments. Peter dropped me an email the other day, and I share his suspicion that this may effect many in the coming weeks operating RAC environments. If you don’t have a RAC, you may not see this happening with GI 19.31 and 19.32: trace file flooding in mgmtca.trc can happen.

GI 19.31 and 19.32: trace file flooding in mgmtca.trc can happen

Photo by Giovanna Gomes on Unsplash

What happens?

It took me a bit of searching, and Peter collected a lot of information already.

Two months after patching GI …

Grid Infrastructure: Bye Tomcat – welcome Micronaut

Posted on May 19, 2026 by Mike.Dietrich Installation OCW Oracle AI Database 26ai Oracle Database 19c 14

Anil Nair wrote it in his MAA Blog Post on April 28: “Oracle is simplifying the software stack by replacing Apache Tomcat application server with Micronaut framework.”. And since some of you asked already, let me give you a bit more information about this change in 19.30 and 19.31 with Grid Infrastructure: Bye Tomcat – welcome Micronaut.

Grid Infrastructure: Bye Tomcat - welcome Micronaut

Photo by Hayrullah Gozcu on Unsplash – and I know, the jet in the picture isn’t an F-14 Tomcat 🙂

It happens automatically

At first, no action is needed from your side. This behavior change happens automatically.

It is the …

OCW 19.28 contains a tiny behavior change with DB_UNIQUE_NAME

Posted on March 18, 2026 by Mike.Dietrich Behavior Change OCW 0

A colleague brought this to my attention the other week. And since the blog serves also as my partial memory, I wanted to put this out quickly. It is not a big deal, and most of you will never see this or be affected by it. Still, some may need to be aware that OCW 19.28 contains a tiny behavior change with DB_UNIQUE_NAME.

OCW 19.28 contains a tiny behavior change with DB_UNIQUE_NAME

Photo by Anton Ryazanov on Unsplash

What has happened?

In the Oracle Clusterware (OCW) Release Update (RU) 19.28 and onward you will find a fix for Bug 34966087 – AH: CRS: FAIL START ACTION IF DB …

Voodoo with init parameters and Oracle Restart

Posted on January 11, 2024 by Mike.Dietrich Flaws and Pitfalls Restart - SIHA - HAS 10

Uwe Kirchhoff, one of the best techies I know in the entire Oracle CSS (formerly ACS) Support, mailed me before the Christmas holidays with a simple question. He discovered that altering init.ora parameters in a session does not necessarily write the parameter down into the spfile. Sounds a bit like Voodoo with init parameters, and Oracle Restart has a role in this story as well. If you don’t have or do not plan to use Oracle Restart, then this is not interesting for you. But of course, you are free to still read it 🙂

Voodoo with init parameters and Oracle Restart

Photo by Marko Manojlovic on

Hide and Seek with RU 19.18.0

Posted on February 2, 2023 by Mike.Dietrich Flaws and Pitfalls Patch Recommendation 46

One and a half weeks ago we released the Database and Grid Infrastructure Release Updates (RU) 19.18.0. You could read on the blog how to apply it, and you could read also about an alert. So far, all was more or less transparent but apparently sort of an Hide and Seek with RU 19.18.0 has happened. So let me shed some light.

Photo by Braydon Anderson on Unsplash

Heads Up!

I am just the messenger trying to bring some light into the topic. Neither is our team responsible nor do we have any sort of control on this process. I …

MRP3 for Oracle 19.17.0 adds an interesting surprise

Posted on January 30, 2023 by Mike.Dietrich Flaws and Pitfalls Patch Recommendation 9

You may have read my previous blog posts about MRPs (Monthly Recommended Patches). And today I did a quick check with Rodrigo. We both were a bit surprised to have the MRP3 for 19.17.0 add a lot of fixes to a standard RDBMS installation. So we were investigating a bit further. As a teaser, read on to see that MRP3 for Oracle 19.17.0 adds an interesting surprise.

MRP3 for Oracle 19.17.0 adds an interesting surprise

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How did we find out?

The MRP3 for Oracle Database 19.17.0 got released just a week ago. You can navigate to it via MOS …

Intel uses AutoUpgrade to upgrade from Oracle 11.2.0.4 to 19c

Posted on September 27, 2022 by Mike.Dietrich Customer Success 18

Funny, I was traveling recently with RAC PM Anil Nair – but he forgot to tell me that this cool story has been published just a few days before we took of for YATRA 2022 to India: Intel uses AutoUpgrade to upgrade from Oracle 11.2.0.4 to 19c. I know that Anil is simply so busy – and my surprise was huge.

Intel uses AutoUpgrade to upgrade from Oracle 11.2.0.4 to 19c

Photo by Daniel Pantu on Unsplash

What’s the story?

Gagan Singh, Enterprise Architect at Intel, shared it with me last week. The goal was to upgrade from Oracle 11.2.0.4 to Oracle 19c with the least amount of downtime …

Binary patching is slow because of the inventory

Posted on May 10, 2022 by Mike.Dietrich Patch Recommendation 57

The headline of this blog post may sound a bit cryptic: Binary patching is slow because of the inventory. But actually this seems to be one of the main causes when your binary patching gets slower and slower with every patch you apply.

Photo by Valdemaras D. on Unsplash

The more you patch, the worse it gets

Well, this is a tough headline. But you may have read my blog posts about my quarterly patching experience. It actually started with the July 2021 RU in my 19c environment when I wrote:

At least in my environment, both checks with the

Oracle Database 12.2.0.1 – End of Support and Patch Bundles

Posted on April 26, 2022 by Mike.Dietrich Release Schedule 1

This will be a short blog post but since I received a number of messages yesterday after I published my usual Patching all my environments with the April 2022 Patch Bundles blog post I need to clarify a few things regarding Oracle Database 12.2.0.1 – End of Support and Patch Bundles.

Oracle Database 12.2.0.1 - End of Support and Patch Bundles

Photo by Samuel Scrimshaw on Unsplash

Premier Support for Oracle 12.2.0.1

If you remember this, the Premier Support period for Oracle 12.2.0.1 ended on November 30, 2020.

Limited Error Correction Support for Oracle 12.2.0.1

Since many of you were still on Oracle 12.2.0.1 when the end of Premier Support …

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

Oracle Database 12.2.0.1 and GI are certified on OL8 and RHEL8

Posted on December 14, 2021 by Mike.Dietrich Operating System 4

No worries, this isn’t a blog post from the vault. And I haven’t accidentally published something from the past just today. It is real. Oracle Database 12.2.0.1 and GI are certified on OL8 and RHEL8.

Oracle Database 12.2.0.1 and GI are certified on OL8 and RHEL8

Photo by Derek Oyen on Unsplash

What has been certified?

Thanks to my colleagues and a large customer in the UK, I received an email asking whether I have seen this information already on MOS. I haven’t. I knew that there were discussions but I had no actual date for the 12.2.0.1 certification on OL8 on my radar.

So in brief, these Linux 8 releases …

Which database version can be used with Grid Infrastructure 19c?

Posted on October 6, 2020 by Mike.Dietrich ASM / RAC / GI 25

This will be a very short blog post today. But a colleague asked me this question just a few minutes ago: Which database version can be used with Grid Infrastructure 19c? And I realized that I neither put it on the blog yet nor did I bookmark it. But I answered this question several times already.

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Which database version can be used with Grid Infrastructure 19c?

There are 4 sources I did check:

MOS Notes on MyOracle Support
Oracle Documentation
Certification Information on MyOracle Support
Database Upgrade Blog

At first, I answered with MOS …

Do you need to apply OJVM patches to Grid Infrastructure?

Posted on January 24, 2020 by Mike.Dietrich ASM / RAC / GI Patch Recommendation 19

From time to time, when I discuss OJVM patching with customers, I hear the following question: Do you need to apply OJVM patches to Grid Infrastructure? I’m carrying around this topic since months actually.

Do you need to apply OJVM patches to Grid Infrastructure?

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A quick MOS check

Well, you’d assume this is something MOS does give you an answer within fractions of a second. But nope. I found a lot but unfortunately not what I was looking for. What I found instead where community discussions where applying OJVM patches to a 12.1.0.2 GI installation corrupted the inventory. Hence, there seems to be some …

Exadata Upgrade to OL7 and to Oracle 19c

Posted on August 29, 2019 by Mike.Dietrich Exadata / ODA 4

This is just a short blog post to ensure I will find the necessary information when somebody asks me again.. In case you plan to do an Exadata upgrade to OL7 and to Oracle 19c, the below links are the most important ones you should start with.

Exadata Upgrade to OL7 and to Oracle 19c

–Mike…

Where does the database link SYS_HUB come from?

Posted on September 24, 2018 by Mike.Dietrich ASM / RAC / GI Flaws and Pitfalls 6

This blog lives a lot from customer’s feedback and updates. And these days, Nicolas Jardot from dbi-services in Switzerland sent me an email asking: Where does the database link SYS_HUB come from? And if he can delete it or if it has any deeper purpose. Neither Google nor MOS reveal a lot of useful information

Where does the database link SYS_HUB come from?

I took my vanilla 18.3.0 database in our hands-on lab and check:

column owner format a5
column db_link format a12
column username format a12
column host format a12

select con_id, owner, db_link, username, host from cdb_db_links;

    CON_ID

Oracle 12.2.0.1 RESTART: Make sure you’ve patched your Oracle 12.1.0.2 homes

Posted on August 31, 2017 by Mike.Dietrich Restart - SIHA - HAS 10

This blog post title sounds a bit weird, doesn’t it? Oracle 12.2.0.1 RESTART: Make sure you’ve patched your Oracle 12.1.0.2 homes. Why the heck should you patch your 12.1.0.2 database homes upfront?

Oracle 12.2.0.1 RESTART: Make sure you’ve patched your Oracle 12.1.0.2 homes

Well, there’s an interesting issue happening. When you work with Oracle Grid Infrastructure, no matter if you operate a cluster or “just” use Oracle Restart, you’ll have to upgrade GI to Oracle 12.2 first before you can manage 12.2 databases with it. That’s not new. It’s a well understood rule.

Now guess you operate Oracle RESTART (SIHA …

Grid Infrastructure

Are there security fixes included? Which CVEs?

Release Updates are the primary vehicle

GI 19.31 and 19.32: trace file flooding in mgmtca.trc can happen

What happens?

Grid Infrastructure: Bye Tomcat – welcome Micronaut

It happens automatically

OCW 19.28 contains a tiny behavior change with DB_UNIQUE_NAME

What has happened?

Voodoo with init parameters and Oracle Restart

Hide and Seek with RU 19.18.0

Heads Up!

MRP3 for Oracle 19.17.0 adds an interesting surprise

How did we find out?

Intel uses AutoUpgrade to upgrade from Oracle 11.2.0.4 to 19c

What’s the story?

Binary patching is slow because of the inventory

The more you patch, the worse it gets

Oracle Database 12.2.0.1 – End of Support and Patch Bundles

Premier Support for Oracle 12.2.0.1

Limited Error Correction Support for Oracle 12.2.0.1

Some additional information regarding the Oracle 19.14.0 RUs

555.1 is one

Oracle Database 12.2.0.1 and GI are certified on OL8 and RHEL8

What has been certified?

Which database version can be used with Grid Infrastructure 19c?

Which database version can be used with Grid Infrastructure 19c?

Do you need to apply OJVM patches to Grid Infrastructure?

A quick MOS check

Exadata Upgrade to OL7 and to Oracle 19c

Where does the database link SYS_HUB come from?

Where does the database link SYS_HUB come from?

Oracle 12.2.0.1 RESTART: Make sure you’ve patched your Oracle 12.1.0.2 homes

Oracle 12.2.0.1 RESTART: Make sure you’ve patched your Oracle 12.1.0.2 homes

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