Query Store Reports Time Intervals
A great question came up over at DBA.StackExchange regarding the query store reports time intervals: How can SQL Server's Query Store Reports show data for minute-length intervals, when "Statistics Collection Interval" is set to 1 hour? I was intrigued because it's not something I had thought about at all. How Does the Report Decided on Time? The first thing you need to know is that all performance information inside Query Store is aggregated. By default, the aggregation interval is 60 minutes. You can adjust that up or down (although, I wouldn't recommend making it too granular, you'll see a massive increase in storage size). It's aggregated because trying to capture every execution of every query, as anyone who has done it using Extended Events knows, is expensive and has a…