Comprehensive automated test coverage tool kit – Service bus (and ICS)

If we are not test first (or at least test alongside) programming, we are essentially debug later programming (See "Physics of Test Driven Development").

If the enterprise service bus sits in the middle of an organisation's messaging and integration landscape, there are some key architectural principles that help in getting the best out of any service bus solution:
  • It is not the place for business logic but for integration logic i.e. heavy on (more...)

Performance Analysis of a CPU-Intensive Workload in Apache Spark

Topic: This post is about techniques and tools for measuring and understanding CPU-bound and memory-bound workloads in Apache Spark. You will find examples applied to studying a simple workload consisting of reading Apache Parquet files into a Spark DataFrame.
 

Why are the topics discussed here relevant

Many workloads for data processing on modern distributed computing architectures are often CPU-bound. Typical servers underlying current data platforms have a large and increasing amount of RAM and (more...)

Oaktable World 2017 @ Oracle Open World

 

http://www.oaktable.net/blog/oak-table-world-2017-oracle-open-world

The Oak Table members will be discussing their latest technical obsessions and research on Monday and Tuesday, (Oct. 2nd and 3rd, 2017).  The truth is, folks-  The Oak Table experts are an AWESOME group, (if I don’t say so myself! :)) as we could have easily done another day of incredible sessions, but alas, two days is all we have available for this year’s event.

 

Screen Shot 2017-09-29 at 11.10.53 AM

Screen Shot 2017-09-29 at 11.11.04 AM

Configure Oracle Reports 12c (12.2.x) for destype=file

I currently had in a project a request, that Oracle Reports should be generated with the option destype=file to a specific location on the server which is hosting the Oracle Forms & Reports 12c environment.

Since Oracle Forms & Reports 12c, the so called "File System Access Control" is enabled by default, so any request like http://<server>:<Port_of_ManagedServer_Reports>/reports/rwservlet?report=test.rdf&userid=test/test@db1&destype=file&desformat=pdf&desname=/u00/app/oracle/demo_app/rep_output/test.pdf&server=rep_server1 will fail:

When you check the corresponding log files for your Reports Server you will (more...)

Irish people presenting at OOW

Here is a list of presentations at Oracle Open World and JavaOne in 2017, that will be given by people and partners based in Ireland.

(I'll update this list if I find additional presentations)

DayTimePresentationLocation
Sunday13:45-14:30SQL: One Language to Rule All Your Data [OOW SUN1238]

Brendan Tierney, Oralytics

SQL is a very powerful language (more...)

Two interesting reads on team structure and focus

Two interesting reads on team structure and focus

(Re)discovered two interesting reads on team structure and focus this week that I like to share.

Pioneers, Settlers and Town Planners

pioneer, settler and town planner The Pioneers, Settlers and Town Planners approach help structure organisations and teams. It takes into account how activities and practices move from chaotic (poorly understood, uncertain, constantly changing, rare, future source of worth) to more linear (well-defined, predictable, stable, common, cost of doing business) and how (more...)

How to group connected elements (or pairs)

I see quite often when developers ask questions about connected components:

Table “MESSAGES” contains fields “SENDER” and “RECIPIENT”, which store clients id.
How to quickly get all groups of clients who are connected even through other clients if the table has X million rows?
So for this table, there should be 4 groups:
  • (1, 2, 4, 8, 16)
  • (3, 6, 12)
  • (5, 10, 20)
  • (7, 14)
  • (9, 18)
SENDERRECIPIENT
12
24
3 (more...)

Multiple smtp relay send accounts for office365



This is a follow up on this post here about smtp and office365 - after some more investigation i've made some further changes as our use case changed slightly and the original solution didn't fit.

Originally we just needed to be able to send all emails originating from a single account and we had some postfix config that would do that.

Now however we want to be able to send smtp messages out from multiple (more...)

Performance Analysis of a CPU-Intensive Workload in Apache Spark

Topic: This post is about techniques and tools for measuring and understanding CPU-bound and memory-bound workloads in Apache Spark. You will find examples applied to studying a simple workload consisting of reading Apache Parquet files into a Spark DataFrame.

 

IoT Workshop and Robots

AppsLab has been offering the IoT Workshop since Oracle OpenWorld 2016. And over past one year we have hosted the workshop in 20 cities around world as part of Oracle Code events, plus at Kscope 2017 conference. And if you still managed to miss all the events,  Oracle OpenWorld 2017 might be your last chance ????

IoT device kit for workshop participants

IoT device kit for workshop participants

Just come by Oracle Developer Community Lounge in Moscone West (no pre-registration (more...)

Avoiding reinventing the wheel – use MULTISET EXCEPT to get set relative complement

Today in an application I stumbled upon a PL/SQL function created to return those elements of one nested table that did not exist in another nested table. Not a huge function, but still a bit of work and some thinking that had been done some while ago to compare the elements and create the desired output nested table.

The trouble is, that this functionality already natively exists in PL/SQL (and SQL) - the developer had (more...)

Delete large amounts of data on Galera Cluster using pt-archiver

Galera Cluster is excellent virtually synchronous multi-master database cluster. It has many benefits which you can check on GaleraCluster.
But beside benefits it has some limitations and one of them is handling large transactions.

Large replication data sets could degrade performance of whole cluster causing cluster freezing, increased memory consumption, crashing nodes, etc. To avoid this issues it is recommended to split large transactions into smaller chunks.

In this post I want to show you (more...)

Choropleths

In this post I will simultaneously have Fun With Data and Fun With Maps. I will use public APIs to turn my Isle of Alameda into a “choropleth“, a map which displays areas that are colored or patterned in relation to data.

To do this I will need to find boundaries within Alameda that I can associate with data of some kind. For this I turn to the ultimate source of geographical data (more...)

Optimize Oracle response times with Cary Millsap using Method R




Came across this interesting logical method of Oracle Database Tuning called as Method R, created by Cary Millsap (pictured), a performance tuning expert and an Oracle veteran. If you want to learn more about Method R, you can attend the webinar below. The following information is from Cintra where Cary is currently a Vice President.

------------------------------------------------------------------------

Date: Wednesday 27th September 2017

Time: 11:00 (EDT) and 16:00 (BST) 
Duration: 30 minutes + 15 minutes Q&A
Location: (more...)

Performance Feedback Optionen in 12c aktivieren und deaktivieren

Christian Antognini erläutert in seinem Blog, welche Schwierigkeiten sich in 12c ergeben, wenn man das "Performance Feedback" aktivieren oder deaktivieren möchte. Zur Erinnerung: das Performance Feedback ist ein adaptives Feature und dient zur automatischen Prüfung, ob ein initial gewählter Parallelisierungsgrad tatsächlich vorteilhaft ist. Relativ harmlos ist bei der Konfoiguration noch der Faktor, dass sich der zugehörige Parameter in 12.1 OPTIMIZER_ADAPTIVE_FEATURES nennt, während er in 12.2 (bzw. auch in 12.1, wenn man den (more...)

Activating and Deactivating Performance Feedback

Performance feedback is one of the adaptive query optimizer features introduced in Oracle Database 12c. The aim of this short post isn’t to explain how it works, but to simply warn you about a buggy behavior in its configuration.

The parameters that control performance feedback are the following:

  • OPTIMIZER_ADAPTIVE_FEATURES (12.1 only): if set to TRUE (default), performance feedback is enabled. Otherwise, it is disabled.
  • OPTIMIZER_ADAPTIVE_STATISTICS (12.1 with patch 22652097, and 12.2): if (more...)

OOW is just around the corner

Originally posted on HeliFromFinland:
I cannot believe how fast time flies! It has been an exceptionally busy year and that is the reason I have not had time to write blog posts either. I have been speaking in amazing events like BIWA Summit, APEX Connect, Riga DevDays 2017, OTNEMEA Tour in Baku and in Madrid,…

News Regarding Post "bind csid (#) does not match session csid (#)"

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

After further investigation and analysis, here some more news regarding the problem with "bind csid (#) does not match session csid (#)"

I wrote: "Reason was - in my case - that an agent, which has connected to a freshly created clone of a production database a little to early, was stuck with an Character Set which was current at the time of the first connect. (more...)

IoT Cloud Brewed Beer @ OOW

For the past few months we have worked together with the Oracle Developer Community and Alpha Acid Brewing on a secret IoT project.   Come see (and taste!) it at the Developer Lounge in Moscone West during Oracle Open World.

Hope to see you there!

Cheers,

Mark.Possibly Related Posts:

Too big to fail

There is this saying in the English language that something is “too big to fail”. It can refer to almost anything, a country, an initiative, a company, etc. What it tries to say is that, whatever the subject, is so big by now that there is simply no chance that it will ever go away … Continue reading "Too big to fail"