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Klaus Aschenbrenner

Klaus Aschenbrenner provides independent SQL Server Consulting Services across Europe and the US. Klaus works with the .NET Framework and especially with the SQL Server 2005/2008 from the very beginnings. In the years 2004 - 2005 Klaus was entitled with the MVP award from Microsoft for his tremendous support in the .NET Community. Klaus has also written the book Pro SQL Server 2008 Service Broker which was published by Apress in the Summer of 2008. Further information about Klaus you can find on his homepage at http://www.SQLpassion.at. He also twitters at http://twitter.com/Aschenbrenner.

Speaking at SQLSaturday #310 in Dublin/Ireland

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

I’m very proud to announce that I will speak at the SQLSaturday #310 in Dublin. On September… Read more

0 comments, 367 reads

Posted in Klaus Aschenbrenner on 26 May 2014

Statistics with Ascending Key Column Values

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

In today’s blog posting I want to talk about a very common problem within SQL Server: handling… Read more

0 comments, 629 reads

Posted in Klaus Aschenbrenner on 19 May 2014

Debugging a SQL Server query with WinDbg

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

In my last blog posting I gave you a general introduction to WinDbg, and told you how… Read more

5 comments, 939 reads

Posted in Klaus Aschenbrenner on 13 May 2014

SQL Server Debugging with WinDbg – an Introduction

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

In today’s blog posting I want to dig into a completely different area in SQL Server: how… Read more

10 comments, 3,021 reads

Posted in Klaus Aschenbrenner on 5 May 2014

SQL Server Quickie #13 – Hash Join Operator

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

Today I have uploaded the 13th SQL Server Quickie to YouTube. This time I’m talking about the… Read more

0 comments, 775 reads

Posted in Klaus Aschenbrenner on 29 April 2014

A ever-increasing Clustered Key value doesn’t scale!

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

You know all the best practices how to choose a Clustered Key value? A good Clustered Key… Read more

10 comments, 527 reads

Posted in Klaus Aschenbrenner on 15 April 2014

Improving Query Performance by using correct Search Arguments

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

In today’s blog posting I want to talk about a very specific performance problem related to indexing… Read more

0 comments, 3,885 reads

Posted in Klaus Aschenbrenner on 8 April 2014

Goodbye SQL Server, Hello FileMaker…

The last weeks were very time consuming for me, because I had to make a very tough decision: staying independent and providing high quality SQL Server consulting and training services, or getting employed (again), and being part of a greater team to influence how the IT industry will be in… Read more

0 comments, 596 reads

Posted in Klaus Aschenbrenner on 1 April 2014

SQL Server Quickie #12 – Nested Loop Operator

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

Today I have uploaded the 12th SQL Server Quickie to YouTube. This time I’m talking about the… Read more

0 comments, 580 reads

Posted in Klaus Aschenbrenner on 31 March 2014

The Illusion of Updateable Clustered ColumnStore Indexes

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

In todays blog posting I want to concentrate in more details on the Updateable Clustered ColumnStore Index… Read more

8 comments, 1,520 reads

Posted in Klaus Aschenbrenner on 25 March 2014

Performance improvements in SQL Server 2014

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

SQL Server 2014 will be an amazing release regarding all the various performance enhancements that are part… Read more

2 comments, 590 reads

Posted in Klaus Aschenbrenner on 18 March 2014

Buffer Pool Extensions in SQL Server 2014

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

In todays blog posting I want to talk about Buffer Pool Extensions that are introduced with SQL… Read more

0 comments, 782 reads

Posted in Klaus Aschenbrenner on 11 March 2014

SQL Server Quickie #11 – Non Clustered Indexes

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan – you get a weekly email packed with all the essential knowledge you need to know about performance tuning on SQL Server.)

Today I have uploaded the 11th SQL Server Quickie to YouTube. This time I’m talking about Non… Read more

0 comments, 220 reads

Posted in Klaus Aschenbrenner on 3 March 2014

Lock Escalations

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan, where you are getting week by week via email all the essential knowledge you need to know about performance tuning on SQL Server.)

In todays blog posting I want to talk about Lock Escalations in SQL Server. Lock… Read more

0 comments, 2,903 reads

Posted in Klaus Aschenbrenner on 25 February 2014

Improving SQL Server Performance by using Instant File Initialization

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan, where you are getting week by week via email all the essential knowledge you need to know about performance tuning on SQL Server.)

Today I want to talk about a very specific topic in SQL Server – Instant… Read more

0 comments, 2,577 reads

Posted in Klaus Aschenbrenner on 18 February 2014

DELETE operations on tables

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan, where you are getting week by week via email all the essential knowledge you need to know about performance tuning on SQL Server.)

In todays blog posting I want to show you quickly about what happens in SQL… Read more

0 comments, 461 reads

Posted in Klaus Aschenbrenner on 11 February 2014

Announcing the SQLpassion Performance Tuning Training Plan

You are a developer and/or DBA and want to learn in a very compact way the essential things about performance tuning & troubleshooting SQL Server installations? In our new free 6 month long SQLpassion Performance Tuning Training Plan we give you week by week via email all the essential knowledge… Read more

0 comments, 456 reads

Posted in Klaus Aschenbrenner on 3 February 2014

SQL Server Quickie #10 – Forwarding Records

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan, where you are getting week by week via email all the essential knowledge you need to know about performance tuning on SQL Server.)

Today I have uploaded the 10th SQL Server Quickie to YouTube. This time I’m talking… Read more

0 comments, 443 reads

Posted in Klaus Aschenbrenner on 29 January 2014

Inside the Statistics Histogram & Density Vector

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan, where you are getting week by week via email all the essential knowledge you need to know about performance tuning on SQL Server.)

You know the problem: the “Estimated Number of Rows” in an operator in the Execution… Read more

0 comments, 2,011 reads

Posted in Klaus Aschenbrenner on 28 January 2014

Myths and Misconceptions about Transaction Isolation Levels

(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan, where you are getting week by week via email all the essential knowledge you need to know about performance tuning on SQL Server.)

In todays blog posting I want to talk about myths & misconceptions about the various… Read more

0 comments, 2,656 reads

Posted in Klaus Aschenbrenner on 21 January 2014

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