My NoPlsql versus SmartDB deep-dive presentation materials

For those who are interested here are my two slidedecks used in yesterday's deep-dive session at ODTUG, here they are in ppsx format which includes all the animations. Part 1: Comparison between NoPlsql and SmartDB approach Part 2: SmartDB, how to do it? Enjoy. Toon

Usability, Product Management, and LinkedIn – a rant

L
inkedIn began as a professional networking site, has evolved into a social media behemoth, and has yet managed to maintain and sharpen its focus on the professional space. That may, in part, explain why, in 2016, Microsoft chose to put down more than $26 billion Washingtons to buy LinkedIn.
While both LinkedIn's web site and mobile app have undergone substantial changes over the years, and is a far cry from the spartan look both (more...)

Diving into Spark and Parquet Workloads, by Example

Topic: In this post you can find a few simple examples illustrating important features of Spark when reading partitioned tables stored in Parquet, in particular with a focus on performance investigations. The main topics covered are:
  • Partition pruning
  • Column projection
  • Predicate/filter push-down
  • Tools for investigating Parquet metadata
  • Tools for measuring Spark metrics

Motivations: The combination of Spark and Parquet currently is a very popular foundation for building scalable analytics platforms. At least this is what (more...)

Parameterizing Jmeter for testing APEX

A while ago we needed to stress a system by using the APEX Brookstrut demo application.  The obvious choice for this was Jmeter.  How to setup Jmeter to record web traffic by becoming a web proxy is very known and well written process.  Anyone that hasn't seen it, check this PDF and you can see how easy it is. There were a couple issues to get around. First importing the application again and

Oracle GoldenGate Cloud Service

Even on Amazon AWS, for the migration of Oracle databases from on-prem to Cloud, my tool of choice is GoldenGate. The general steps I took for this migration was to create extract on source in on-prem, which sent data to replicat running in AWS Cloud in EC2 server, which in turn applied data to cloud database in RDS.




I was intrigued to see this new product from Oracle which is Oracle GoldenGate Cloud Service (GGCS).

(more...)

DOAG Red Stack Magazin Artikelreihe "Oracle Database Cloud Performance" (German)

In der aktuellen Ausgabe des für Mitglieder der DOAG, SOUG und AOUG kostenlosen DOAG Red Stack Magazins wurde der erste Teil meiner zweiteiligen Artikelserie "Oracle Database Cloud Performance" veröffentlicht.

Die Artikelserie basiert auf den hier bereits publizierten Erkenntnissen in diesem Bereich und führt diese weiter fort.

Der erste Teil geht auf die verschiedenen Aspekte der maximal erreichbare Performance ein (CPU, Storage etc.), der zweite Teil wird in der nächsten Ausgabe zu lesen sein und (more...)

bind csid (#) does not match session csid (#)

Problem

A database's alert log is full of messages like


Wed Jun 28 09:13:09 2017
Errors in file /cloudfs/adr/diag/rdbms/scs12fi/SCS12FI/trace/SCS12FI_ora_16694.trc:
Wed Jun 28 09:13:10 2017
Errors in file /cloudfs/adr/diag/rdbms/scs12fi/SCS12FI/trace/SCS12FI_ora_16694.trc:
Wed Jun 28 09:13:13 2017
Errors in file /cloudfs/adr/diag/rdbms/scs12fi/SCS12FI/trace/SCS12FI_ora_16694.trc:
Wed Jun 28 09:16:25 2017

Errors in file /cloudfs/adr/diag/rdbms/scs12fi/SCS12FI/trace/SCS12FI_ora_16694.trc:

The trace (more...)

Web Services: REST vs SOAP

I was in the middle of a discussion earlier today about service-based integration for Oracle HCM Cloud.  In that conversation, someone asked me why anyone would ever use SOAP over REST.  My answer was pretty lengthy but, when I was done, someone said I ought to share it on my blog. 

Well, here's the thing:  my thinking on the subject is not original.  I simply communicate fundamentals I learned elsewhere.  And I'm big on (more...)

Reactive Microservices with Lagom & Java – DZone Refcard

Wow. I haven't blogged here in a while. Good news, the blog isn't dead and not going to die anytime soon. I'm just spending a lot of time blogging over at lightbend.com/blog (Have you seen the monthly Lightbend Tech Digest yet?) and also help developing additional content around our open source projects. Mostly Lagom. And I am very happy to announce that my first Refcard was published on DZone today: And it is (more...)

EM 13c: TNS-01190 errors when listener owner and agent owner are not the same account

Problem:

When monitoring listener's logfile, lots of TNS-01190 are found:

<msg time='2017-06-26T10:21:47.608+02:00' org_id='oracle' comp_id='tnslsnr'
 type='UNKNOWN' level='16' host_id='edosrvoda03'
 host_addr='192.168.15.70'>
 <txt>26-JUN-2017 10:21:47 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=edosrvoda03)(USER=oracle))(COMMAND=trc_directory)(ARGUMENTS=2)(SERVICE=LISTENER)(VERSION=202375680)) * trc_directory * 1190
 </txt>
</msg>
<msg time='2017-06-26T10:21:47.608+02:00' org_id='oracle' comp_id='tnslsnr'
 type='UNKNOWN' level='16' host_id='edosrvoda03'
 host_addr (more...)

Asrock E3C224DI-14S IPMI not reachable

Documentation missing There's definately some documentation missing on the IPMI settings. I managed to lock myself out of the IPMI (also know as 'Integrated Light Out', or ILO) management interface. Not sure how I managed to do that, but in the quest to find out how to restore devine powers, I noticed quite a lot of people suffered from this. And, the solution is quite simple, when you know

Installing App Designer on Ubuntu

It’s been a while since I have tried to install Application Designer directly on my Linux host. In fact, the last time I tried was many tools versions ago. Since I’ve been playing with a PUM again, it’s time to give it another try.

Here’s my notes:

Installing Wine

I figured that my best chance at getting App Designer to work was to use the latest version of Wine. So, I used the repository to (more...)

I am speaking at Mumbai, OTNYatra 2007! Come and say Hi!

I am speaking at Mumbai leg of OTNYatra 2007. I shall be presenting about high availability in RAC and what are different options and configurations possible in it, including the 12c specific Transacion Guard and Application Continuity. If you are attending, do come at my session at 4pm and say Hello!

Passion, Drive and Hunger

Uncategorized
| Jun 23, 2017
Starting a business is nothing short of an ultra marathon times 365.  If you ask people why they do it, you'll get a wide variety of answers.  Some people might say "the money" but behind most any answer you will receive is an iceberg underneath (90% of an iceberg is under the water).  Others will say they are simply crazy.  The true reason is very complex.  It's not usually one reason, but passion, drive and (more...)

Removing Outliers using stddev()

A colleague asked me about removing outliers from reports and I knew just the function to give a go.

Some time ago I had to prove that some data we had conformed to a normal distribution. Remember those from high school?
A normal distrubition (bell curve)
That request was about 2007 and I ended up using stddev() and lpad() to produce a vertical shaped bell curve in SQL*Plus. That was pretty cool.

As for removing (more...)

New Window Bookmarklet

I am a "New Window" link junkie. I use that link ALL THE TIME! If it were possible to wear it out, mine would be worn out. I wish all PeopleSoft pages had the "New Window" link. For some reason, however, certain developers chose to remove it from specific PeopleSoft pages (such as Structure and Content). I'm sure there is a good reason... there just has to be. So seeing it missing from Fluid has (more...)

Connecting to your AWS Instance with SSH

If you're using our AMIs from the Amazon Marketplace you might need some guidance on connecting using ssh. We've put together the steps below as a guide to help.

How to SSH using Mac/Linux

1. In (more...)

Annual Oracle release cycle coming?

Those of you on Twitter at the end of May, and certainly those at DOAG might have seen this announcement.

I'm no DBA, but that first sentence in the picture has the potential to be rather game changing.
Annual Feature Release of (more...)

Storage Server: Firmware

Firmware The first thing to do, in order to get any software RAID program to run, is to flash the controller out of RAID mode. Only then all of the disks will be seen as just a bunch of disks - nothing else. JBOD that is, for short. The board I have, comes with a LSI SAS2308 controller, to with I want to connect 12 SATA drives using three SAS-to-SATA breakout cables. Drivers There are

Where is My New Window Link?

As PeopleSoft moves from Classic to Fluid, you have likely noticed the missing New Window link. Why is it missing? I can only speculate. When considering mobile, perhaps it makes sense to drop the New Window link. Mobile devices have limited screen real estate. Why waste it with a link you will likely never use on a mobile device? On a desktop, however, the New Window link is irreplaceable. So... what to do? How can (more...)