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Oracle disables your multitenant option when you run on EC2
I have installed Oracle 19.6 on an EC2 for our Multitenant Workshop training. And of course, during the workshop we create a lot of PDBs. If you don’t have paid for the Enterprise Edition plus the...
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Oracle recovery concepts
I’ve published a while ago a twitter thead on some Oracle recovery concepts. For those who are not following twitter, I’m putting the whole thread here: Here I start a thread about some Oracle...
View ArticleA change in full table scan costs in 19c?
During tests in Oracle 19c I recently experienced this: cbleile@orcl@orcl> select * from demo4 where m=103; cbleile@orcl@orcl> select * from table(dbms_xplan.display_cursor); ......
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Setup Oracle XE on Linux Mint – a funny exercise
On my old Laptop (Acer Travelmate with an Intel Celeron N3160 CPU) I wanted to install Oracle XE. Currently the available XE version is 18.4. My Laptop runs on Linux Mint 19.3 (Tricia). The Blog will...
View ArticleCleanup a failed Oracle XE installation on Linux Mint
On this Blog I described on how to install Oracle XE on a current Linux Mint version (19.3. Tricia when writing the Blog). After the conversion of the Oracle provided rpm to a deb installation file...
View ArticleStarting an Oracle Database when a first connection comes in
To save resources I thought about the idea to start an Oracle database automatically when a first connection comes in. I.e. if there are many smaller databases on a server, which are not required...
View ArticleFind the SQL Plan Baseline for a plan operation
By Franck Pachot . If you decide to capture SQL Plan Baselines, you achieve plan stability by being conservative: if the optimizer comes with a new execution plan, it is loaded into the SQL Plan...
View Article“Segment Maintenance Online Compress” feature usage
By Franck Pachot . On Twitter, Ludovico Caldara mentioned the #licensing #pitfall when using the Online Partition Move with Basic Compression. Those two features are available in Enterprise Edition...
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Oracle Support: Easy export of SQL Testcase
By Franck Pachot . Many people complain about the quality of support. And there are some reasons behind that. But before complaining, be sure that you provide all information. Because one reason for...
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티베로 – The most compatible alternative to Oracle Database
By Franck Pachot . Do you remember that time where we were able to buy IBM PC clones, cheaper than the IBM PC but fully compatible? I got the same impression when testing Tibero, the TmaxSoft...
View ArticlePatching ODA from 18.3 to 18.8
Introduction 19c will soon be available for your ODAs. But you may not be ready. Here is how to patch your ODA from 18.3 to 18.8, the very latest 18c release. This patch has here been applied on X7-2M...
View ArticleODA 19.6 is available
Introduction It’s been 1 year now that 19c is available on-premise. Finally, 19c is now available today on ODA too, in a real production release. Let’s have a glance of what’s inside. Is 19.6 available...
View ArticleMigrating From Oracle Non-CDB 19c to Oracle 20c
With Oracle 20c, the non-multitenant architecture is no longer supported. So, people will have to migrate their databases to container if they want to use Oracle 20c. There are many methods to...
View ArticleTerraform and Oracle Cloud Infrastructure
Introduction When you learn a cloud technology, like OCI, the one from Oracle, you start building your demo infrastructure with the web interface and numerous clicks. It’s convenient and easy to...
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The myth of NoSQL (vs. RDBMS) agility: adding attributes
By Franck Pachot . There are good reasons for NoSQL and semi-structured databases. And there are also many mistakes and myths. If people move from RDBMS to NoSQL because of wrong reasons, they will...
View ArticleAPEX Connect 2020 – Day 1
This year the APEX connect conference goes virtual online, like all other major IT events, due to the pandemic. Unfortunately it spans only over two days with mixed topics around APEX, like JavaScript,...
View ArticleHandle DB-Links after Cloning an Oracle Database
By Clemens Bleile After cloning e.g. a production database into a database for development or testing purposes, the DBA has to make sure that no activities in the cloned database have an impact on data...
View ArticleAPEX Connect 2020 – Day 2
For the second and last virtual conference day, I decided to attend presentations on following topics: – Universal Theme new features – Oracle APEX Source Code Management and Release Lifecycle – Why...
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Oracle Materialized View Refresh : Fast or Complete ?
In contrary of views, materialized views avoid executing the SQL query for every access by storing the result set of the query. When a master table is modified, the related materialized view becomes...
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20c: AWR now stores explain plan predicates
By Franck Pachot . In a previous post https://blog.dbi-services.com/awr-dont-store-explain-plan-predicates/ I explained this limitation in gathering filter and access predicates by Statspack and then...
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