Wait Stats In Query Store

Andrejs Antjufejevs has great news if you’re using Query Store:

Starting today in Azure SQL Database and from CTP 2.0 of SQL Server 2017 wait stats per query are available in Query Store. Now you can exactly identify why and how much every plan waited for some resource. Information about wait times are persisted so you can also analyze through the history what was the problems and why queries waited for resources

This is a welcome improvement for query tuners on 2017.

Related Posts

Good Query Store Default Settings

Erin Stellato gives us a starting point for good values for Query Store settings: QUERY_CAPTURE_MODE The default value for SQL Server 2016 and SQL Server 2017 is ALL.  For Azure SQL Database, the default value is AUTO. With AUTO, queries that are insignificant from a resource utilization perspective, or executed infrequently, are not captured.  If […]

Read More

Getting Wait Stats From The Query Store

Erin Stellato shows how to retrieve wait stats per query from Query Store: In SQL Server 2016 a new DMV is exposed, sys.dm_exec_session_wait_stats, which provides information about waits for an existing, active session. If you know the session_id, you can track waits for a query when it starts and when it completes (snapshot the information at […]

Read More

Categories

July 2017
MTWTFSS
« Jun Aug »
 12
3456789
10111213141516
17181920212223
24252627282930
31