I'm Klaus Aschenbrenner

I help people to bring their sql server installations to a new level of excellence.

“Klaus resolved our performance problems quickly and easily and gave us perfect guidance to avoid them in the future.” Michael from Mannheim, Germany

SQLpassion Offerings

SQLpassion, a European SQL Server consulting company, provides high-quality SQL Server consulting services. We are based in Vienna, Austria, but our client base is spread across the continent. We provide the following SQL Server services:

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You have seen my Blog Postings?

Do you need more than STATISTICS IO for Query Tuning?

The session option STATISTICS IO is my friend during query tuning engagements, because it tells you exactly how many page ...


Plan Caching

The Performance Penalty of Bookmark Lookups in SQL Server

SQLpassion Web Cast February 2017: CXPACKET Waits

SQLpassion Online Trainings in March 2017

SQL Server Performance Tuning Workshop in London


Time for a latest SQL Server Quickie:

Upcoming Events

Webcast: Troubleshooting CXPACKET Waits, February 27
Webinar: SQL Server Query Tuning Fundamentals, February 28
SQL Server Query Tuning Workshop
SQL Server Performance Tuning Workshop


SQLBits, April 5 – 8 in Telford/United Kingdom
Techorama, May 22 – 24 in Antwerp/Belgium


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