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Credits to: Connor Cunningham and Query Store team Visual Studio Online Bob Ward, Principal PM Architect long Survives crashes Records critical information Records for limited time Doesn’t record everything Broadly utilize Query Store to ensure optimal and predictable performance for their tenants. “Highly recommend to everyone! “Query Store has allowed us to pinpoint and fix problems that would be very difficult to analyze without the detailed information it provides” Today Yesterday Today Yesterday Today Yesterday Upgrade to SQL Server 2016 (stay at prior DB Compatibility Level) Enable Query Store, Capture Plans Set Compatiblity Level to 130 Use Query Store to Force Old Plans Quickly For Any Regressions Protection Optimization • Regressed queries • Excessive resource consumption • Database upgrade • Change verification • Improve ad-hoc workloads • Identify execution patterns • Analyze execution variability Query Store Scenarios @ MSDN internal tables Query Text Context Settings 1:N Query 1:N 1 - n Plan views 1:N 1 - n Runtime Stats Compile stats: query_store_query_text query_context_settings query_store_query query_store_plan 1:N Runtime Stats Interval One Row Per Query Text Per Plan Affecting Option Per Object Example: ANSI NULLS on/off, query inside/outside SP One Row Per Plan (for each query) sys. One Row Per Plan Per Time Interval (example: 5 min) Runtime stats: query_store_runtime_stats_interval query_store_runtime_stats Execution Type (completed, client aborted, server aborted) Plan Store Stats Interval Timeframe for aggregation of stats for plan Flush Interval How often we persist to disk In Out SELECT DDL UPDATE INSERT DELETE BULK INSERT “Commands” CREATE, ALTER, DROP, … DBCC, KILL, BACKUP, … sys.database_query_store_options Best Practices …a workload data recorder for your databases QUERY STORE …the starting point for performance troubleshooting …gives you full control wherever you are (on-premises, in the cloud) Query Store: A flight data recorder for your database Monitoring Performance By Using the Query Store Azure SQL Database Query Performance Insight [email protected] www.microsoft.com/itprocareercenter www.microsoft.com/itprocloudessentials www.microsoft.com/mechanics https://techcommunity.microsoft.com http://myignite.microsoft.com https://aka.ms/ignite.mobileapp