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April 2014

On Error Messages

Here’s a pet peeve of mine: Customers who don’t read the error messages. The usual symptom is a belief that there is just on error: “Doesn’t work”, and that all forms of “doesn’t work” are the same. So if you tried something, got an error, your changed something and you are still getting an error, nothing changed.

I hope everyone who reads this blog understand why this behavior makes any troubleshooting nearly impossible. So I won’t bother to explain why I find this so annoying and so self defeating. Instead, I’ll explain what can we, as developers, can do to improve the situation a bit. (OMG, did I just refer to myself as a developer? I do write code that is then used by customers, so I may as well take responsibility for it)

Here’s what I see as main reasons people don’t read error messages:

LVC Producers at #Oracle University

LVC stands for Live Virtual Class – this is how we call our courses done interactively over the internet. At Oracle University, we have a fine crew of people who take care that the attendees (as well as the instructor, sometimes) are not impacted by technical problems. This can be e.g. connectivity issues, browser incompatibilities, questions how to deal with the learning platform WebEx or which way to choose to access the remote lab environment. All that and more is handled by LVC producers, so that the instructor can focus on the educational matters. I really appreciate this separation of duties, because I find it already demanding enough to deliver high quality Oracle Technology classes!

Hello Delphix!

After almost 16 years as an independent consultant, with a couple side-steps into the world of small consulting-services startups, I’ve accepted an offer from Delphix, a startup building the future of information technology, enabling agile data management and storage virtualization.

I’m closing EvDBT as a business, since the employee count will reduce from one to zero, and finishing up my consulting engagements, starting with my new employer on 01-May 2014.

Thank you, EvDBT.  You were my lifeboat and my vehicle to a better career and a better life!

#Oracle University Expert Summit in London

Three days full of seminars are offered by Oracle University in London (19th to 21st May) at the Expert Summit

Oracle University Expert Summit

It is my pleasure to present there together with Arup Nanda, Dan Hotka, Jonathan Lewis and my dear colleagues Iloon Ellen-Wolff and Joel Goodman.

Analysing Parallel Execution Skew - Without Diagnostics / Tuning Pack License

This is the third part of the video tutorial "Analysing Parallel Execution Skew". In this part I show how to analyse a parallel SQL execution regarding Parallel Execution Skew.

If you don't have a Diagnostics / Tuning Pack license the options you have for doing that are quite limited, and the approach, as demonstrated in the tutorial, has several limitations and shortcomings.

Here is the video:

OUGN : Summary

With the exception of a 5+ hour layover in Amsterdam, the trip home was pretty straight forward. I flew to Amsterdam with Lonneke DikmansRonald Luttikhuizen and Roel Hartman. During my rather excessive layover, I played catchup with all the internet stuff I missed during the trip… :)

I must say OUGN 2014 was a pretty cool event all round! The speaker lineup was incredible. The location (on a boat) was fun. I’ve not done that for a while. In addition to the presentations, I got a lot of time to talk to people about technology, which is what I love doing, so that made me happy…

Grid Infrastructure upgrade to 11.2.0.4 on AIX - always read log files

Oracle Restart 11.2.0.3 and same version of database has to be upgraded into 11.2.0.4. Looks like quite easy task but I hit some problems with it.

I had 31.9 GB free and OUI through error about disk space. Fair enough cause it also proposed a parameter to ignore it. Current version of GI (11.2.0.3) occupied around 25 GB so i though it will be OK to use a parameter.

-bash-3.2$ ./runInstaller -silent -responseFile /software/oracle/database/aix/grid_reponse_file_11204.rsp \
-waitforcompletion -ignoreDiskWarning
********************************************************************************

Your platform requires the root user to perform certain pre-installation

Grid Infrastructure upgrade to 11.2.0.4 on AIX - always read log files

Oracle Restart 11.2.0.3 and same version of database has to be upgraded into 11.2.0.4. Looks like quite easy task but I hit some problems with it.

I had 31.9 GB free and OUI through error about disk space. Fair enough cause it also proposed a parameter to ignore it. Current version of GI (11.2.0.3) occupied around 25 GB so i though it will be OK to use a parameter.

-bash-3.2$ ./runInstaller -silent -responseFile /software/oracle/database/aix/grid_reponse_file_11204.rsp \
-waitforcompletion -ignoreDiskWarning
********************************************************************************

Your platform requires the root user to perform certain pre-installation

OUGN : Day 2

Day 2 started really early. Having got to bed about 02:00, I was up at 05:30 and thinking about my 08:30 session. The previous evening’s conversation with Brynn was playing on my mind a little (in a good way), thinking how that conversation should/would affect my session. The session itself seemed to go well. I enjoyed it anyway. :)