Query Store Data Cleanup
Microsoft supplies quite a few knobs to control how Query Store performs data cleanup. You can set your cleanup various ways, and, they interact. Let's talk about how and why Query Store does it's data cleanup. Query Store Size Limit The most important thing to understand here is that Query Store won't just keep collecting data forever, filling your hard drive. There is a hard limit to how much data Query Store contains. By default, prior to 2019, that was 100mb. After 2019, it's 1,000mb. You can, of course, adjust this up, or down, as needed on your systems. It's a database-by-database setting (as so much of Query Store is). You can change this through SSMS: Change the "Max Size (MB)" value. That's it. Nice & simple. You can also…