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Monitor deadlock sql server 20127/25/2023 ![]() The tools we used to need to use to capture deadlocks (server-side trace, SQL Server Profiler) are prohibitively expensive to run all the time, or even for a short time, or we had to mess around with trace flags.The production workload, both in terms of volume and/or composition, can’t be realistically reproduced in development either.There are multiple actual users involved with the problem.Internals, Troubleshooting, Video Demos Deadlocks, Internals, SQL Server, Troubleshooting, Video Demos Capture Deadlocks 24/7 with Extended Eventsĭeadlocks can be notoriously difficult to reproduce in our development environments. If you want to reproduce the situation yourself, you can download the scripts here. (Sorry my cursor isn’t visible in the video - I blame the capture program I used. I also look at the locks that are held and requested by each process, and introduce you to reading a deadlock graph (which is what’s captured from the Extended Events deadlock capturing system I presented last week). ![]() In this video demo, I demonstrate a basic sequence of events needed to create a deadlock. This is done by an internal process called the Deadlock Monitor. SQL Server resolves these situations automatically by terminating one of the processes, thus allowing the other(s) to proceed. This results in neither process being able to continue. Deadlocks occur when two processes both hold locks on resources, and also try to take locks on resources from the other process.
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