Multitenant

Migrating Flashback Data Archive (FDA) tables

Posted on April 8, 2022 by Mike.Dietrich Export - Import 11

This morning I received an email question from a customer asking whether there is support for the Migrating Flashback Data Archive (FDA) tables in Oracle 19c. And since this is not the first time I received this question, I thought it may be good to have a blog post about it.

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What is Flashback Data Archive (FDA)?

Well, google it. Actually I was looking for a link in our documentation but to my surprise I found the usual suspects such as Tim Hall’s excellent oracle-base page – but not much in our own doc …

UNDO_RETENTION not inherited to PDBs anymore since 19.9.0

Posted on July 12, 2021 by Mike.Dietrich Behavior Change 15

Behavior changes introduced via a bug fix may not be something you like a lot. And thanks to Sreedhar from one of our most important customers I learned on the weekend: UNDO_RETENTION not inherited to PDBs anymore since 19.9.0.

UNDO_RETENTION not inherited to PDBs anymore since 19.9.0

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What is happening before 19.9.0?

Until Oracle 19.8.0 you could change the UNDO_RETENTION in the CDB$ROOT, and it applied to all PDBs automatically. You may or may not have cared. But there are cases when you’d like to change an undo related parameter in the CDB$ROOT without its propagation into all PDBs.

This behavior …

Data Pump Super Patch for Oracle 19.10 and newer

Just a few days we released a Data Pump Super Patch for Oracle 19.10 and newer. “Newer” refers to the fact that once 19.11.0 will be available, this merge patch I’m writing about will be available as well right away (sorry, got delayed a bit). And if you work with Data Pump, you may want to consider this performance patch collection.

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Why do you need this patch?

Many customer will know the issue that adding changes with datapatch may take a long time as soon as dpload.sql is involved. And this …

Do you need the Mitigation Patch in CDB$ROOT and all PDBS?

Posted on January 25, 2021 by Mike.Dietrich JVM Patch Recommendation 10

Thanks to Axel Delin for asking this very reasonable question on the blog. Do you need the Mitigation Patch in CDB$ROOT and all PDBS? Background for this question is that Axel can’t remove JVM but doesn’t use it. A typical case we cover in our slides and presentations as well. And in this case, the Mitigation Patch will become your friend. Please note: If you DON’T have JAVAVM in your database, you won’t need to pay attention and instead could stop reading now.

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Mitigation Patch

You can read more about the Mitigation Patch, and …

User Group Seminars in October about Upgrade, Migration and Patching

Posted on September 30, 2020 by Mike.Dietrich Workshop 0

I didn’t blog a lot in the past weeks. At the moment, most of my time is consumed either by customer web meetings and workshops, or the preparation for the User Group Seminars in October about Upgrade, Migration and Patching. Below I will list these – please feel free to sign up. #SupportUserGroups

User Group Seminars in October about Upgrade, Migration and Patching

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October 1 – Swiss Oracle User Group

October will start for me with a keynote for the Swiss Oracle User Group on Thursday, October 1 at 13:00h, about the Migration to Oracle Multitenant.

Registration: https://soug.ch/soug-day-september-21st-2020/
Date / Time:

LAOUC Web Seminar: Oracle Multitenant – 3 PDBs and many secrets

Posted on August 17, 2020 by Mike.Dietrich Workshop 2

Just a few hours left until I’ll start my LAOUC Web Seminar: Oracle Multitenant – 3 PDBs and many secrets today, Aug 17, 2020. I’m really looking forward to it even though it is a bit sad this time. Usually in the past years I was traveling to Latin America. And I enjoyed the intense discussions in Uruguay, Argentina and Brazil a lot. The local folks invest so much time in these yearly user group conferences. Hence, as for most other events as well, this year you’ll be able to participate virtually over multiple days.

LAOUC Web Seminar: Oracle Multitenant - 3 PDBs and many secrets

Oracle Multitenant – 3 PDBs

Upgrade Seminars 2020 – Recap and Videos on-demand

Posted on July 6, 2020 by Mike.Dietrich Workshop 4

Thank you for participating in our 4 Database Upgrade to Oracle 19c seminars in the past two weeks. There were over 800 questions during the seminars – and it was a good idea that we prerecorded them. This way, I could answer your questions as it was a more convenient time for me than for Roy. We enjoyed it a lot – and from the feedback I read, most of you enjoyed it, too. Now please read about Upgrade Seminars 2020 – Recap and Videos on-demand below.

Upgrade Seminars 2020 - Recap and Videos on-demand

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The Slides

I uploaded all 4 decks …

Upgrade Seminars 1 and 2 – A quick recap, slides download and more

Posted on June 25, 2020 by Mike.Dietrich Best Practice Workshop 2

Thank you for participating in the first two seminars. Roy and I did already the “Release and Patching Strategy” webinar on Tuesday, June 23. And today “AutoUpgrade to Oracle 19c”. So it time for Upgrade Seminars 1 and 2 – A quick recap, slides download and more.

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Slides Download

I uploaded the slides already to https://mikedietrichde.com/slides/#WEB2020. Of course, I will upload the other slide decks as well to the same location.

Seminar Recordings

As soon as the recordings page has been completed, we will send out an email. And I will post the links …

Can you connect as SYSDBA without password into a PDB directly?

Posted on May 7, 2020 by Mike.Dietrich Single-/Multitenant 27

I’m happy when I learn something new every day. And today, right before I wanted to turn my computer into “sleep”, I learned something which surprises me a lot. Have you ever asked the question: Can you connect as SYSDBA without password into a PDB directly? Of course with the usual way of “sqlplus / as sysdba”.

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Can you?

Our answer always was: No. You can’t. There is no bequeath connection available.

Today somebody asked a similar question internally. And the answer caught Roy, Daniel, Bill and myself by surprise. There is an …

3 Live Seminars: Multitenant Seminar 3 Questions answered

Posted on May 3, 2020 by Mike.Dietrich Workshop 0

This is the third and final QA blog post for the Seminars we did in the last week of April 2020. Thank you for your attendance. I will publish the replay recordings as soon as they are available and link them as well. For now, please find here 3 Live Seminars: Multitenant Seminar 3 Questions answered.

3 Live Seminars: Multitenant Seminar 3 Questions answered

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Your Questions, our Answers for Seminar 3: Multitenant

103	We are in the process of migrating to Oracle Cloud using the xtts method for cross platform migration and we seem to be encountering an issue with it

3 Live Seminars: Database Upgrade and more – April 28, 29 and 30, 2020

Posted on April 24, 2020 by Mike.Dietrich Workshop 13

Well, everybody does Web Seminars now, right? Just in case you sit at home next week on Tuesday, Wednesday and Thursday, you’ve just had your lunch. And you don’t know what do to in the afternoon, sign up and click in to our 3 Live Seminars: Database Upgrade and more – April 28, 29 and 30, 2020. Every day at the same time, 14:30h CET (or 13:30 GMT or 18:00 IST).

3 Live Webinars: Database Upgrade and more – April 28, 29 and 30, 2020

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Another Web Seminar?

It’s free – FIND THE REGISTATION LINKS BELOW – of course. My colleague Laura Garcia and I will talk …

OJVM datapatch fails with ORA-29532 – but the root cause is noncdb_to_pdb.sql

Posted on April 20, 2020 by Mike.Dietrich Flaws and Pitfalls JVM 2

Kudos to Robert Ortel who brought this nice misbehavior to my attention. And even though it looks like this would be an OJVM issue, it is caused by noncdb_to_pdb,sql, the script which is used to convert a non-CDB to a PDB. When you apply an OJVM patch, OJVM datapatch fails with ORA-29532 – but the root cause is noncdb_to_pdb.sql.

OJVM datapatch fails with ORA-29532 - but the root cause is noncdb_to_pdb.sql

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It’s a bit tricky

First things first. This is not a blog post to blame OJVM. The problem just happens because datapatch for an OJVM patch touches data in the dictionary which hasn’t …

Be aware when you use _ORACLE_SCRIPT in scripts

Posted on February 10, 2020 by Mike.Dietrich Best Practice 8

Recently I came across this when I gave a Multitenant workshop at a German customer. As part of the workshop I explained the _ORACLE_SCRIPT statements you will find in almost all scripts in ?/rdbms/admin. And one of the DBAs gave me a bright smile. He mentioned: “We use it already everywhere to avoid strange errors”. But be aware when you use _ORACLE_SCRIPT in scripts. I will explain, why this can be dangerous.

Be aware when you use _ORACLE_SCRIPT in scripts

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What does _ORACLE_SCRIPT do?

First of all, this is an underscore parameter. Hence, you won’t find it in the Oracle …

Oracle Multitenant: Be aware of the silent COMPATIBLE change

Posted on February 7, 2020 by Mike.Dietrich Single-/Multitenant 5

This topic is included in our Multitenant slides for a long time. But whenever I want to point somebody to the blog post, I realize that it’s not on the blog yet. Actually I discussed this topic recently during a customer visit again. It’s time to put it on the blog. When you use Oracle Multitenant: Be aware of the silent COMPATIBLE change.

Oracle Multitenant: Be aware of the silent COMPATIBLE change

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Mixed version environments

When you work with Oracle Multitenant, the sooner or later you will have mixed version environments. This may be CDBs with Oracle 12.1.0.2 or Oracle 12.2.0.1 together with …

Can you have more than 1 PDB with Standard Edition 2 (SE2)?

Posted on January 29, 2020 by Mike.Dietrich SE2 - Standard Edition 2 Single-/Multitenant 0

When we announced the 3-PDB-Support with Oracle Database 19c onward at OpenWorld 2019, I was very excited. According to the license documentation, this applies to Standard Edition 2 (SE2) as well. But does it work? Can you have more than 1 PDB with Standard Edition 2 (SE2)?

Can you have more than 1 PDB with Standard Edition 2 (SE2)?

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The license documentation is pretty clear about 3 user-created PDBs:

https://docs.oracle.com/en/database/oracle/oracle-database/19/dblic/Licensing-Information.html#GUID-0F9EB85D-4610-4EDF-89C2-4916A0E7AC87

Check with Oracle Database 19.5.0 SE2

It’s been a while since I installed SE2 instead of EE. But everything goes smoothly. You just need to select “Standard Edition 2” in the OUI. The image you …

Mobiliar Insurance consolidates over 350 PDBs to new Exadatas

Posted on December 20, 2019 by Mike.Dietrich Customer Success 0

The year is almost over and many of you will take off in your well-deserved holidays. At this point it’s not time yet for a 2019 summary or my “Best Records of 2019” list, but to highlight a great success story from Swiss Mobiliar Insurance’s Oracle team.

Mobiliar Insurance consolidates over 350 PDBs to new Exadatas

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Mobiliar Insurance – never heard about them?

There are actually two typical situations when you’ve never heard about Mobiliar Insurance (“Die Mobiliar“) before. You either don’t live in Switzerland and you never visited one of our workshops nor any of the talks Alain Fuhrer and …

DBMS_PDB.DESCRIBE – Something to be aware of

Posted on October 28, 2019 by Mike.Dietrich Single-/Multitenant 2

When I wrote up my long blog post series about how to migrate to Multitenant, I came across an interesting behavior. I could create the XML manifest file to plugin without putting the database in read-only mode. But I learned afterwards that there are is a pitfall. Hence, this blog post will talk about DBMS_PDB.DESCRIBE – Something to be aware of.

DBMS_PDB.DESCRIBE - Something to be aware of

DBMS_PDB.DESCRIBE – why and when?

You will use the DBMS_PDB.DESCRIBE call for the sole purpose to create the so called XML manifest file. This file contains information about the non-CDB to plugin afterwards. You either generate it check …

3 PDBs included with Oracle 19c and desupport of non-CDBs with 21c

Posted on September 17, 2019 by Mike.Dietrich Single-/Multitenant 43

It’s Oracle Open World week in San Francisco. and it is time for announcements of course.

3 PDBs included with Oracle 19c and desupport of non-CDBs with 20c

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What has been announced?

Today at OOW 2019, Jenny Tsai-Smith and Dominic Giles announced in their talk that the non-CDB architecture will be desupported from Oracle 21c on. But VERY IMPORTANT, from Oracle 19c on you can have 3 user-created pluggable databases of any type without a Multitenant license. As soon as you have need for 4 or more PDBs within one container database, you will need a Multitenant license.

License Guide

You can find the update …

Oracle EBS 12.2 on-prem is now certified with Oracle 19c – and will become a PDB

Posted on September 12, 2019 by Mike.Dietrich E-Business Suite 0

Great news – and I’m just putting the pieces together. Oracle EBS 12.2 on-prem is now certified with Oracle 19c.

Oracle EBS 12.2 on-prem is now certified with Oracle 19c - and will become a PDB

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Plan your upgrade(s)

You can plan your EBS and database upgrades now. I know from discussions at conferences and workshops, that customers felt locked in on older databases releases. As a result, we waived the Extended Support for the database for those who still are on Oracle 11.2.0.4 and 12.1.0.2 as database for an EBS installation.

Please be aware that the certification as of now includes only Linux and SPARC Solaris platforms. …

Database Migration from non-CDB to PDB – Migration with Data Pump

Posted on August 14, 2019 by Mike.Dietrich Data Pump Single-/Multitenant 14

You may have realized that there are a few techniques missing describing how to do a Database Migration from non-CDB to PDB – Migration with Data Pump is one of them. I will explain the most simple approach of going to Single- or Multitenant. It isn’t the coolest – and it isn’t very fast as soon as your database has a significant size. But it is not complex. And it allows you to move even from very old versions directly into an Oracle 19c PDB – regardless of patch levels or source and destination platform.

Database Migration from non-CDB to PDB – Migration with Data Pump

High Level Overview

Endianness change

Database Migration from non-CDB to PDB – The Minimal Downtime Challenge

Posted on August 13, 2019 by Mike.Dietrich Minimal Downtime Single-/Multitenant 6

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 Minimal Downtime Challenge

When we start to look at a migration from non-CDB to PDB for an important system, regardless of migrating on-prem or to the cloud, reducing the downtime is very important. In this blog post I’d like to highlight the different aspects …

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

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

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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 …

Database Migration from non-CDB to PDB – Various Pitfalls

Posted on August 2, 2019 by Mike.Dietrich Flaws and Pitfalls Single-/Multitenant 22

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Database Migration from non-CDB to PDB – Various Pitfalls

In all the previous blog posts of this series I tried to explain specific pitfalls, and how you can workaround them. This article is meant to collect the “leftovers”, the minor issues and pitfalls which you may not …

Database Migration from non-CDB to PDB – The Patch Level Pitfall

Posted on August 1, 2019 by Mike.Dietrich Flaws and Pitfalls Single-/Multitenant 0

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Database Migration from non-CDB to PDB – The Patch Level Pitfall

When you consolidate on a larger scale, it is very likely that you have different patch levels in your database environments. But when you attempt to plugin a non-CDB into a CDB, you may see …

Database Migration from non-CDB to PDB – The Component Pitfall

Posted on July 31, 2019 by Mike.Dietrich Flaws and Pitfalls Single-/Multitenant 6

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The Component Pitfall

With component we mean the database component which you can find in DBA_REGISTRY – or CDB_REGISTRY. When Multitenant became available over 5 years ago, a decision had been made to make all options/components mandatory in a container database. This decision had to …

Multitenant

What is Flashback Data Archive (FDA)?

What is happening before 19.9.0?

Why do you need this patch?

Mitigation Patch

October 1 – Swiss Oracle User Group

Oracle Multitenant – 3 PDBs

The Slides

Slides Download

Seminar Recordings

Can you?

Your Questions, our Answers for Seminar 3: Multitenant

Another Web Seminar?

It’s a bit tricky

What does _ORACLE_SCRIPT do?

Mixed version environments

Check with Oracle Database 19.5.0 SE2

Mobiliar Insurance – never heard about them?

DBMS_PDB.DESCRIBE – why and when?

What has been announced?

License Guide

Plan your upgrade(s)

High Level Overview

Database Migration from non-CDB to PDB – The Minimal Downtime Challenge

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

Database Migration from non-CDB to PDB – Various Pitfalls

Database Migration from non-CDB to PDB – The Patch Level Pitfall

The Component Pitfall

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