I‘m Klaus Aschenbrenner, a Microsoft Certified Master for SQL Server
» I help people to bring their SQL Server & PostgreSQL
installations to a new level of excellence. «
SQLpassion Offerings
SQLpassion helps businesses get the most out of SQL Server & PostgreSQL – from smooth setups to better performance and long-term stability. As a Microsoft Certified Master, I offer tailored consulting, hands-on workshops, and share my expertise at international events – all with a clear focus on delivering real results.
Read one of my latest blog posts:
Don’t Miss Out – SQL Server 2025 Unleashed Training Starts Next Monday!
Next Monday, March 9, 2026, my one-day live online training SQL Server 2025 Unleashed: AI, Performance & Beyond will take place! This hands-on training is designed to help DBAs, developers, and consultants deeply understand the new features in SQL Server 2025 – like Vector Search, AI integration, Optimized Locking, and JSON support. If you’re still
PostgreSQL Quickie #2: Installation in Virtual Machines
A few weeks I have uploaded my 2nd PostgreSQL Quickie to YouTube. This time I’m talking about PostgreSQL installation in Virtual Machines. If you are interested in learning more about how to transition your SQL Server knowledge seamless to PostgreSQL, I highly recommend to check-out my live training about it that I run from April
The Linux Page Cache and PostgreSQL
PostgreSQL performance on Linux is often discussed in terms of SQL tuning, indexes, and query plans. Yet many real-world performance problems originate much lower in the stack: inside the Linux page cache and its writeback policy. PostgreSQL deliberately relies on the kernel for file caching and writeback, which means that kernel misconfiguration can silently undermine
Watch one of my latest YouTube videos:
PostgreSQL Quickie #2: Installation in Virtual Machines
A few weeks I have uploaded my 2nd PostgreSQL Quickie to YouTube. This time I’m talking about PostgreSQL installation in Virtual Machines. If you are interested in learning more about how to transition your SQL Server knowledge seamless to PostgreSQL, I highly recommend to check-out my live training about it that I run from April
Introducing my new PostgreSQL Quickies Series on YouTube
For many years I have been publishing my SQL Server Quickies – short, focused videos that explain specific database topics in just a few minutes. These quick sessions have helped countless developers and DBAs to sharpen their skills without the need to spend hours in front of lengthy tutorials. Now it’s time to expand this concept into
Online Recording: Exploring PostgreSQL for SQL Server Developers and DBAs
On January 9 I have done an online presentation about Exploring PostgreSQL for the SQL Server Developers and DBAs for the Cloud Data Driven User Group. You can find the recording of the whole session (around 105 minutes) here to watch: If you’d like to explore the differences between SQL Server and PostgreSQL in greater depth,
