I don’t find bugs in SQL Server all that often. I find bugs in my own code all the time.
In this case I double checked, and I think it’s a real SQL Server bug.
When I was recently testing tempdb file usage, I used an Extended Events session that used SQL Server’s histogram target to track sqlserver.file_read events in the tempdb database for a specific session.
I recently received a question from a vendor about databases created by software vendors.
I’m not always the best at learning to use graphical interfaces. Maybe that’s why I often don’t like them?
I’m sometimes asked if the number of CPU cores used by a query determines the number of tempdb files that the query can use.
Good news: even a single threaded query can use multiple tempdb data files.
You can’t do everything with a columnstore index – but SQL Server’s optimizer can get pretty creative so it can use a columnstore index in ways you might not expect.
Deadlock graphs are incredibly helpful for figuring out why queries are getting automatically killed off by SQL Server.
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