To stop memory grant feedback, use the hint or the setting that matches the mode of the plan. A tested demo shows that a row mode hint keeps a grant at 13,256 KB, while a batch mode hint changes nothing for a row mode sort. The post also corrects the setting names and shows the persistence switch.
SQL SERVER 2019 – Supports Compatibility Level from 2008 to 2019
Compatibility Level from 2008 to 2019 requires separating database migration from engine upgrade support. SQL Server 2019 supports levels 100 through 150.
Why Query Store Actual Operation Mode is Not Same as Requested? – Interview Question of the Week #248
Question: Why Query Store Actual Operation Mode is Not Same as Requested? Query Regression (poor performing queries, once working great)
Priority Boost in SQL Server: Check It and Turn It Off
Priority boost sounds like a speed setting, but it can make a server slower. This post explains what the option does, checks it with a query that works when Management Studio doesn’t show it, prints the statements that turn it off with their undo, and explains why a restart is needed.
MAXDOP Query Hint: Override the Server Setting for One Query
The MAXDOP query hint sets how many processors one query can use, whatever the server setting says. This post proves it in both directions on a test table, shows that the hint can’t force a parallel plan and adds the database scoped setting between the two. Every step leaves the server setting alone.
Lock Pages in Memory: When to Enable It and How to Check
Lock Pages in Memory is a Windows right that stops Windows from paging out the SQL Server buffer pool. This post explains what it does and what it doesn’t, how to grant it to the service account and how to check the result with T-SQL. It also covers the max server memory setting that must go with it.
Windows Power Plan for SQL Server: Use High Performance
The Windows power plan decides how fast the processors run, and an energy saving plan can slow SQL Server without raising any error. This post shows how to check the active plan, how to switch it and undo the change, and how to time the difference with a repeatable T-SQL loop.