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Monat: Oktober 2017

Blog Post: Last Week in Stream Processing & Analytics – 30.10.2017

Blog Post: Last Week in Stream Processing & Analytics – 30.10.2017

This is the 88th edition of my blog series blog series around Stream Processing and Analytics! As every week I was also updating the following two lists with the presentations/videos of the current week: Presentations from SlideShare Videos from YouTube As usual, find below the new blog articles, presentations, videos and software releases from last […]

Blog Post: The APPROX_MEDIAN Function – A Test Case

Blog Post: The APPROX_MEDIAN Function – A Test Case

The aim of this post is not to explain how the APPROX_MEDIAN function works (you find basic information in the documentation) but to show you the results of a test case I run to assess how well it works. Here’s what I did… I started in the Oracle Database Public Cloud an instance of version […]

Blog Post: Benutzerdefinierte ILM ADO Bedingungen mit PL/SQL

Blog Post: Benutzerdefinierte ILM ADO Bedingungen mit PL/SQL

In meinem post über ILM storage tiering habe ich über ADO-Bedingungen geschrieben, die wir für Storage Tiering Policies angeben können, wenn Datensegmente in einen Read Only Tablespace verschoben werden. Andere Möglichkeit, Storage Tiering mit einer Bedingung zu versehen wäre eine benutzerdefinierte PL/SQL-Funktion, die einen Boolean-Wert zurückgibt. Wie funktioniert das? Und können wir auf die Heat […]

Blog Post: Spring application events lifecycle and earlyApplicationEvents

Blog Post: Spring application events lifecycle and earlyApplicationEvents

Not long ago I learned the hard way the way spring handles earlyApplication events when we started having problems in one of our projects Basically we were using a MongoDB database as a cache layer, so when the application would startup we would pull most of the data from our RDBMS do some processing and denormalisation then fill the MongoDB with data The application had been running mostly fine for some time but we saw some memory issues as the…

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Blog Post: Errors when running TSQL R-Script

Blog Post: Errors when running TSQL R-Script

Assume, you have configured all Settings, as requested in Setup SQL Machine Learing Services / R-Services. But still you are not able to run a TSQL Script like this one:   .. even not as sysadmin! Errors arise like: Msg 39012, Level 16, State 1, Line 8 Unable to communicate with the runtime for ‚R‘ script. Please check the requirements of ‚R‘ runtime. Msg 11536, Level 16, State 1, Line 8 EXECUTE statement failed because its WITH RESULT SETS clause…

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Blog Post: Last Week in Stream Processing & Analytics – 23.10.2017

Blog Post: Last Week in Stream Processing & Analytics – 23.10.2017

This is the 87th edition of my blog series blog series around Stream Processing and Analytics! As every week I was also updating the following two lists with the presentations/videos of the current week: Presentations from SlideShare Videos from YouTube As usual, find below the new blog articles, presentations, videos and software releases from last […]

Blog Post: Apache Kafka installation on Linux

Blog Post: Apache Kafka installation on Linux

In the following post, I will show how to install Apache Kafka on a Linux VM. Apache Kafka is an open-source stream processing platform developed by the Apache Software Foundation written in Scala and Java. First of all we need a Linux VM (e.g Centos 7) with at least 1 GB of RAM Connect as root and […] The post Apache Kafka installation on Linux appeared first on blog.muehlbeyer.net.

Blog Post: Working with stateless session in hibernate and jpa

Blog Post: Working with stateless session in hibernate and jpa

When doing heavy read-only operations in with the database it can be a good idea to take advantage of using Hibernate’s Stateless Session As it name indicates this session does not keep state of the entities that it retrieves from the database and so it bypasses the L1 and L2 cache This can have significant performance impact on heavy DBA read operations (since the state of the entities is not bet tracked) @Component@Scope(„prototype“)public class SomeJpaService {public static final int SCROLL_STEP…

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