Use a #db12c PDB for the #em12c OMR…Finally

In an earlier post, I mentioned that Oracle has finally, offcially supported the Oracle Management Repository (OMR) on Database 12c (  As I’ve been working on a DBaaS project, I built a new Oracle Enterprise Manager (OEM) enivornment to test out a few things.  Since I was rebuilding, I decided to try out the PDB as an OMR (afterall I’ve been asking about this approach).  In the past, installation would fail around (more...)

Setting up Oracle Stream Explorer 12.1.3

Oracle Stream Explorer is available now for download. For those unfamiliar with the product, it is a new tool based on Oracle Event Processing (OEP, formerly known as Complex Event Processing). It’s a graphical interface on OEP, hiding the rather daunting CQL (Continuous Query Language) from the user.

Installation is pretty straightforward. You start with installation of OEP 12.1.3.

Mind you that OEP is installed in (more...)

Changes in JDeveloper 12c BPM simulations

While creating a BPM project simulation in the JDeveloper 12c IDE, I noticed some differences in behavior as opposed to 11g. Although the functionality is mostly unchanged, the UI is different. Most of them are more intuitive, but you might want to check them out and save some time.

  1. Simulations are not always listed by default in the BPM project navigator. You can add them by right-clicking on the project, select New … | From (more...)

Non-CDB Architecture Is Officially Deprecated….

Yeah, it’s indeed true and official. So if you still haven’t started reading and learning Multitenant architecture introduced in and enhanced in, it’s high time that you start doing it. Not because that it’s new but because the old architecture you are familiar with, it’s officially on the verge of extinction.

LGWR terminating instance due to error 338

Recently we came across a issue where our DB crashed with ORA-00338 error . Errors in file /oracle/diag/rdbms/orcl11g/orc11g/trace/orc11g_lgwr_24118.trc: ORA-00338: log 2 of thread 1 is more recent than control file ORA-00312: online log 2 thread 1: '/oracle/oradata/orcl11g/redo02.log' LGWR (ospid: 24118): terminating the instance due to error 338 DB couldn't be restarted as it gave same errors…

Oracle 12c Implicit Result Sets in SQL Developer 4.1

Ever want to run a Stored Procedure or a PL/SQL anonymous block and just want to "print out" the results of a query ?  Even as a little bit of debug information?

In Oracle 11g you have to create a SQL*Plus REFCURSOR variable and then bind it within the anonymous block  or  pass it as an argument to a procedure/function. Run the code and then print the refcursor.

This requires a bit of know how in (more...)

Installing ORDS 3.0 (Early adopter) in Weblogic.

Now the Oracle REST Data Services 3.0 Early Adopter is available, let us have a look how it’s to be installed in Weblogic 12c!

I’ve ommitted the installation or upgrade of Apex here as there is plenty of documentation on that topic, and the ORDS can be applied for other uses than being an Apex Listener since v2.0.4.

Installing ORDS

Download the Application Express and ORDS 3.0 installer from the Oracle (more...)

Oracle Bundle Patching

I’ve spent a few days playing with patching with the so called “Database Patch for Engineered Systems and Database In-Memory”. Lets skip over why these not necessarily related feature sets should be bundled together into effectively a Bundle Patch.

First I was testing going from to BP2 or Then as soon as I’d done that of course BP3 was released.

So (more...) Introduction to Zone Maps Part III (Little By Little)

I’ve previously discussed the new Zone Map database feature and how they work in a similar manner to Exadata Storage indexes. Just like Storage Indexes (and conventional indexes for that manner), they work best when the data is well clustered in relation to the Zone Map or index. By having the data in the table […]

ECO 2014 Slides

Just a quick note that I posted slides for the 2 talks I did at ECO in Raleigh this week:

Keynote: Creative Problem Solving (for Oracle Systems)

In-Memory In Action (without Tanel Poder) :)

Great crowd. I really enjoyed myself.

Note: You can also find other presentations on my Whitepapers/Presentations page via the link at the top of the screen.

Interesting Oracle Syntax Error

As shared by a well known Oracle and Big Data performance geek!

SQL> ALTER SYSTEM SET inmemory_size = 5T SCOPE=spfile;
ALTER SYSTEM SET inmemory_size = 5T SCOPE=spfile
ERROR at line 1:
ORA-32005: error while parsing size specification [5T]

SQL> ALTER SYSTEM SET inmemory_size = 5120G SCOPE=spfile;

System altered.


Index Advanced Compression vs. Bitmap Indexes (Candidate)

A good question from Robert Thorneycroft I thought warranted its own post. He asked: “I have a question regarding bitmapped indexes verses index compression. In your previous blog titled ‘So What Is A Good Cardinality Estimate For A Bitmap Index Column ? (Song 2)’ you came to the conclusion that ‘500,000 distinct values in a 1 […]

12c Upgrade and Concurrent Stats Gathering

I was upgrading an Exadata test database from to and I came across a failure scenario I had not encountered before. I’ve upgraded a few databases to both and for test purposes, but this was the first one I’d done on Exadata. And the first time I’d encountered such a failure.

I started the upgrade after checking with the (more...)

12c In-Memory on RAC

I started looking into In-Memory on RAC this week. Data can be distributed across RAC nodes in a couple of different ways. The default is to spread it across the available nodes in the cluster. So if you had a 2 node cluster, roughly 50% of the data in your table or partition would be loaded into the column store in each of the 2 instances.

SYS@dw1> alter table kso.skew inmemory;

12c In-Memory in PDB

In preparation for our upcoming 12c In-Memory Webcast @CaryMillsap, @TanelPoder, and I solicited questions from members of the universe at large on the interweb. We got a question about how In-Memory works with the 12c multi-tentant option and it got me thinking so I gave a quick try. As it turns out, it works about as you would expect. The basic idea is to turn it on for the container DB (which is where the (more...)

ADF EMG Audit Rules available on JDeveloper 12.1.3

I got a few questions from people why the ADF EMG Audit Rules are not available in JDeveloper 12.1.3. So there has been a new release of the ADF EMG Audit Rules. No new functionality is implemented this time, but the extension is now available for JDeveloper 12.1.3.

If you go to Help -> Check for Updates, tick the Open source and Partner Extensions checkbox and press Next: 

Select the ADF (more...)

My Speaking Schedule for Oracle Open World 2014

A quick post to let you know about the two presentations that I’ll be doing at Oracle Open World 2014.

Session ID:         UGF4482
Session Title:     “Getting Started with SQL Pattern Matching in Oracle Database 12c
Venue / Room:  Moscone South – 301
Date and Time:  9/28/14, 13:30 – 14:15

Session ID:          CON4493
Session Title:      “Regular Expressions (more...)

Rolling Out-of-Place patching para Oracle Grid Infrastructure 12c y 11gR2: clonación en esteroides

Mi artículo más reciente para ToadWorld, dentro de una serie dedicada a aplicar patches con mínima suspensión del servicio. Ahora detallando cómo aplicar patches a Grid Infrastructure usando un Golden Image.

The Next Big Thing

Oracle’s was released a few weeks ago (You can download it from OTN here: Oracle Download). While technically a minor point release, it contains a couple of major features that would normally be rolled out in a more substantial version change like 12cR2 or perhaps V13. Of course the most highly anticipated feature is a new option (Oracle In-Memory Option) that provides a column (more...)

Making the CDB Common User Without Using C## Prefix….

If you have done any play with the latest release of Oracle database 12c, you must have come across the concept of Common and Local users. I won’t rewrite what’s already there in the docs but for setting the context of the post, a Common user must be created with a prefix added to the username-C##. Miss that and you won’t be able to create one while being connected to the Container database. On (more...)