Oracle Database 18c: Documentation released!

Today i surfed to and there i found the documentation for oracle database 18c:

In march 2018 i wrote about the new installation procedure of oracle database 18c via rpm, which was announced inside the "new features".

The installation guide for Linux contains now the commands for installing the database via rpm. Here a screencopy of chapter 11:
 rpm -ivh oracle-ee-db-
This command creates the (more...)

One-off Patch Frustration

Lately I started patching a client’s database ( to the latest PSU (180417). This is a RAC environment with streams and all kind of other features, so over the time we hit quite a lot of different bugs. When we planned this PSU (we installed the bundle patch version), we added about 7 one-off patches … Continue reading One-off Patch Frustration

Oracle Database Software Downloads: 18c released

Ok - not the database binaries but the Oracle Database 18c Release 1 Client is released:

Only for windows and linux - not really suprising, but that shows, which platforms are well supported ;-)

The documentation can be found here.

The documentation is for solaris, too - but without binaries this sounds a little bit strange:

Swiss pgday 2018

The cool thing about zooming out… is that your world appears to get bigger.
Being personally now no longer bound to Oracle, having the opportunity to work with PostgreSQL, also gives the opportunity to go new places and explore new possibilities. One of the cooler things is: participating in Postgres conferences.

Conference vibe

Where Oracle conferences, although having some deep technical aspects, tend to lean towards the business aspects of technology, especially today with Cloud (more...)

Non-existent Objects (and possibly a bug)

This post is following a question I found on LinkedIn. A DBA pasted a strange test case in and I managed to reproduce it in (non-multitenant) and 12.2 (multitenant). But that’s not where the story ends, I wanted to understand what’s going on, so I did some research about it and the result … Continue reading Non-existent Objects (and possibly a bug)

Crash recovery of Oracle databases using Commvault

Some time ago I published an article about creating a RMAN backup using Commvault.

See: .

In this article I describe how to execute a crash recovery using Commvault. You need to do a crash recovery when you lost all your datafiles, redolog files, control files and spfile. For example when all the harddisks on which the oracle database files have been located are lost you need to perform a crash recovery (more...)

Oracle’s extended support – when is it free of charge

It’s such a simple, basic and old question I got from a colleague: “Do you have to pay for extended support?”.  And if so, how much I have to pay for it. So basic and yet… always have to check again  the waived support, what prices and where to find this information. It’s getting more important for Oracle Database 11g, which is at the end of the ‘waived’ support.

What kind of support (more...)

Researching a Bug

A few months ago we hit an Oracle bug related to streams replication crash after creating an index (bug 21320182). There is a patch so we installed the patch in test and it seemed to solve the problem, but we never patched the production. Today we hit this issue in production after creating an index … Continue reading Researching a Bug

Datapach issues

This week I worked on a messy patch. I have a RAC environment with and an old PSU and all kind of one-off patches and I wanted to install the latest PSU (180417). It sounds simple, but it’s not so simple. The thing is that I have 4 database running from the same ORACLE_HOME, … Continue reading Datapach issues

This Week in PostgreSQL – May 31

Since last October I’ve been periodically writing up summaries of interesting content I see on the internet related to PostgreSQL (generally blog posts). My original motivation was just to learn more about PostgreSQL – but I’ve started sharing them with a few colleagues and received positive feedback.  Thought I’d try posting one of these digests here on the Ardent blog – who knows, maybe a few old readers will find it interesting? Here’s the (more...)

Database Requirements for Modern Development

A while ago I wrote a paper talking about what key capabilities databases should provide for today’s software development world. The title of the paper is “Database Requirements for Modern Development“. It got published originally on the Oracle Technology Network and I just republished it here on my website. You can find it under:

V$LOCK Missing Information

In our first BCOUG Tech Day conference, I presented my session “Look Inside the Locking Mechanism”. I presented this topics before a few times and prepared a few demos to show different locking scenarios. During the BCOUG Tech Day I did the same, while the only difference was that for the demo I used Oracle … Continue reading V$LOCK Missing Information

Be the Change You Want to See In the (Tech) World

The only thing that stays the same is change….

As the time flies by and the world turns, I often am jarred back to reality when I discover how the little things we do can have a larger impact on the world around us.

Flying back from Interop ITX and StarEast conferences last week, I was reminded of this.  While reading the latest copy of Wired , I came across a story on D-Tech (more...)

Broadening Your Audience

I spent this week speaking at two conferences that may not be familiar to my usual crowd:
Techwell StarEast Testing Conference in Orlando, FL
Interop ITX Data Conference in Las Vegas, NV

StarEast Testing Conference

Techwell’s event is attended by testers and had over 2000 attendees at the Hyatt Regency Orlando’s Convention Center. This is a huge convention center and I won’t lie- I did try to first register at the Mazda event (more...)

Enhance Vagrant provisioning: install java and database

In my previous blog posts (here and here), I wrote about how to create a base box and a create and start a virtual machine out of it. I started with provisioning, to have the vagrant user adapt the kernel settings, add a install user/owner and create a filesystem on an added disk.

Now let's make the provisioning a bit more interesting and install actual software in it.

Prepare new Vagrant project 

For (more...)

Oracle SOA Suite 12c: complete startup procedure including database and application server

After the first reboot i had to work hard to get the complete system up again. So here a list of all commands:

  1. database
    export ORACLE_HOME=/home/oracle/app/oracle/product/12.2.0/dbhome_1
    export PATH=$PATH:$ORACLE_HOME/bin
    export ORACLE_SID=orcl

    $ sqlplus / as sysdba

    SQL*Plus: Release Production on Fri Feb 16 20:53:02 2018

    Copyright (c) 1982, 2016, Oracle.  All rights reserved.

    Connected to an idle instance.

    SQL> startup
    ORACLE instance started.

    Total System Global Area 1560281088 (more...)

The MongoDB ObjectId explained in under 2 minutes

As you may have noticed, especially when your background is from a MySQL or Oracle database, is that the unique identifier for database records (or ‘documents’ in MongoDB) is quite different. It’s not a incremental counter, but a long string of characters. 12 bytes in hexadecimal format, to be precise. And although they appear to contain no information, they actually do. This is how an ObjectId is composed.

Let’s take an ObjectId:


The first (more...)

A week of PostgreSQL

One of the attractive things of my job is this… Just a bit more often than every now and then, you get the opportunity to get out and meet people to talk about Postgres. I don’t mean the kind of talk I do every day, which has more of a commercial touch to it. – Don’t get me wrong, that is very important too! – But I mean, really talk about PostgreSQL, be part of (more...)

Oracle ORA-02287: sequence number not allowed here

I’ve recently hit an issue when trying to include a sequence.nextval in an Oracle database view. the database throws the following error: [crayon-5aba534de1f38771671729/] I can see why that might not be allowed – each time you select from the view you’ll get a new sequence number making it a bit daft for most circumstances. I

Oracle View Sequence Test