Last week during my SQL Server Performance Tuning Workshop I got quite an interesting question regarding Bookmark Lookup Operations against Clustered Indexes: “How can I find out on which Clustered Index I have the most Lookup Operations performed?” The great thing about SQL Server is that SQL Server logs a ...

I have previously ranted a few times about why a RAID 5 is a terrible idea for storing your Transaction Log, and why it is also very risky to store your data files on a RAID 5 volume. But in today’s blog post I want to show you how the ...

As you might know, SQL Server uses internally Statistics to estimate how many rows are returned from a specific query. That process is called the Cardinality Estimation. Based on the output from the Cardinality Estimation the Query Optimizer generates an Execution Plan, which is cached and finally executed. In today’s blog ...

Today’s blog posting is a little bit off-topic, but still quite interested when you work in the IT area. Maybe a few of you already know it, but over the last few years I have worked (and I’m still working) on a quite interesting side project: I’m developing my own ...

Today I’ve announced my SQLpassion Online Trainings for May 2017. On May 15 I’m doing again a free webcast from 11:00 – 12:00 (GMT + 1), where I will talk about how to Troubleshoot Latches in SQL Server. And on May 16 I’m running again a one-day long webinar about ...