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Hans-Jürgen Schönig

Founder & CEO of CYBERTEC
Hans-Jürgen Schönig has worked with PostgreSQL since the 90's. He is the CEO and technical lead of CYBERTEC PostgreSQL International, a market leader in the field. He's served countless customers around the globe since the year 2000. He is also the author of the well-received "Mastering PostgreSQL" book series, as well as several other books about PostgreSQL replication and administration.

Articles by Hans-Jürgen Schönig

PostgreSQL: Detecting slow queries quickly

by Hans-Jürgen Schönig | 05.2021
UPDATED March 2023: In this post, we'll focus our attention on PostgreSQL performance and detecting slow queries. Performance tuning does […]

Setting up PostgreSQL streaming replication

by Hans-Jürgen Schönig | 05.2021
There are two types of replication available in PostgreSQL at the moment: Streaming replication & Logical replication. If you are looking […]

Terminating database connections in PostgreSQL

by Hans-Jürgen Schönig | 05.2021
In PostgreSQL, every database connection is a server-side process. This makes PostgreSQL a robust multi-process rather than a multi-threaded solution. […]

PostgreSQL: Understanding deadlocks

by Hans-Jürgen Schönig | 04.2021
Many might have seen PostgreSQL issue the following error message: "ERROR: deadlock detected". But what does it really mean? How […]

Cleaning up a large number of BLOBs in PostgreSQL

by Hans-Jürgen Schönig | 04.2021
PostgreSQL allows end users to store BLOBs (binary large objects) in the database. Many people use these functions to handle […]

Getting started with QGIS, PostgreSQL and PostGIS

by Hans-Jürgen Schönig | 04.2021
Visualizing spatial data is an important task. In this mini-tutorial, you will learn how to quickly visualize OpenStreetMap (OSM) data […]

PostgreSQL: Get member roles and permissions

by Hans-Jürgen Schönig | 04.2021
PostgreSQL provides a highly sophisticated and powerful security and permission system. It allows you to define users (= roles), groups […]

How the PostgreSQL query optimizer works

by Hans-Jürgen Schönig | 03.2021
Just like any advanced relational database, PostgreSQL uses a cost-based query optimizer that tries to turn your SQL queries into […]

Setting up SSL authentication for PostgreSQL

by Hans-Jürgen Schönig | 03.2021
PostgreSQL is a secure database and we want to keep it that way. It makes sense, then, to consider SSL […]

PostgreSQL: Getting started on Ubuntu

by Hans-Jürgen Schönig | 03.2021
To make it easier for our readers to install PostgreSQL on Ubuntu, we have compiled a quick guide to getting […]
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