Deadlocks in a SQL Server instance are problematic. They can cause application errors, slow performance, and unhappy users. As a DBA or developer, it’s very helpful to be able to find deadlocks, review what caused them, and fix it permanently, if possible. How do you find deadlocks? Over the years, there have been various methods, […]
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Have you ever wondered how you could take one or more .sql files you captured as a workload and run them against a SQL Server or Azure SQL Database to test performance or impact? Microsoft has a free tool to do just that – ostress. Ostress.exe is part of the RML utilities. The first step […]
Throughout the last few years, I’ve worked with SQL Server Availability Groups, Transactional Replication, and Azure SQL Databases. Recently, I had the challenge and opportunity to work on a project that involved all three at the same time. The goal was to take six databases that were in a SQL Server 2012 Availability Group and […]
It’s my T-SQL Tuesday! I’ve spent the last year learning and teaching Extended Events – because if you really want to learn something, teach. XE can be used for everything from very simple tasks, such as counting the number of query executions, to very complicated tasks, such as anything Jonathan Kehayias writes about! I’m encouraging […]
We meet again for another edition of T-SQL Tuesday! On Tuesday, June 9, 2015, you’re invited to blog about a chosen topic. Link back to this blog post, read what others have written, and post about it on Twitter. We share knowledge and get to know other bloggers! The June 2015 topic is Extended Events. […]
This is an outline of the tools and scripts I used while demonstrating conversion of a sample “we make all our changes in production” database into a basic pipeline to verify and deploy changes automatically, as well as verify restores on a nightly basis. This post contains all of the steps, software, and scripts that […]
Availability Groups were introduced in SQL Server 2012 and have quickly become the forefront of high availability for the SQL Server Database Engine Services. In prior versions of SQL Server, true high availability was not a complete solution packaged with the native installation and feature set. While mirroring was introduced in SQL Server 2005 and […]
I recently came across the following error message when I tried to look at the batches in the Integration Management section of MDS: 515: A database error has occurred. Please contact your system administrator Too bad I am the system administrator on that machine… Anyway, after some searching it came out the MDS stored procedure udpEntityStagingAllBatchesByModelGet throws […]
It’s T-SQL Tuesday! This month, Michael Swart has challenged us to argue against a popularly-held opinion about SQL Server. “Arguing Against Popular Opinion” sounds like the title of my autobiography. You’ve been told time and again to back up your SQL Server system databases – master, msdb, and model. I’m here to tell you it’s not […]
For the preparation of my upcoming talk about SQL Server 2012 Master Data Services on the Microsoft Business Analytics Day (hosted by my company element61), I read the book Master Data Services 2nd edition by Tyler Graham. I had almost no prior experience with MDS up to this point (I very quickly glanced over it […]