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DMV in SQL Server is a catch-all term for Database Management Views [& Functions]. Technically they are all now DMOs (Database Management Objects) however the term DMV is still widely understood and accepted by most.

3 votes
1 answer
174 views

Understanding SQL Server plan cache

I've been reading about the SQL Server plan cache and optimizing for adhoc workloads, etc. I'm fairly new to the topic and have a few general questions to help paint a better picture: Suppose I have …
John Russell's user avatar
8 votes
2 answers
2k views

SQL Server performance: PREEMPTIVE_OS_DELETESECURITYCONTEXT dominant wait type

After making sure that the culprit was in fact SQL Server, I took a look at the top waits for the instance using the DMV query here. …
John Russell's user avatar