A lot of developers are approaching me very often, and tell me that they are using the NOLOCK query hint to get rid of blocking situations in SQL Server. Unfortunately the NOLOCK query hint is not really a good solution when you hit blocking situations, because SQL Server can return you uncommitted data. Therefore I …
The unwanted Side Effects of enabling Read Committed Snapshot Isolation + read more
In today’s blog posting I want to talk about a quite simple question in SQL Server: is a SELECT statement always executed? The question itself seems to be quite easy, but the answer to it isn’t that simple. Let’s look at the following example: SELECT * FROM Person.Person As you can see this is a …
Today I’m quite happy to announce my SQLpassion Online Trainings for the remaining year. Currently I have scheduled the following online trainings: SQL Server Query Tuning Fundamentals Design, Deploy, and Optimize SQL Server on VMware SQL Server in the Cloud SQL Server Performance Troubleshooting Hands-On Labs As you can see from this list, I have …
Do you have ever heard about an “Event-Less” Extended Event Session? What is the idea about it? Why do you want to have an Extended Event Session without any events? Let’s talk about it… Event Less When you create an Extended Event Session in SQL Server, the definition of the Event Session specifies which Events, …
In today’s blog posting I want to talk about a very interesting topic: in which execution state is a query waiting on “something”? By definition we can all agree that a query always waits in the SUSPENDED state. But this behavior is not really true. So let’s talk about it… Query Life Cycle Every time …
Does a Query always wait in the SUSPENDED State? + read more
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