How to find slow running T SQL query

Top 10 ways to find slow running T SQL query

Followings are ways to identity and capture the slow running queries in SQL server database.

 

1.Use common activity monitor and task manager to get some overview

Right click the instance – Activity monitor

2.Use DMVs

Use Glenn Berry’s DMV pack https://www.sqlskills.com/blogs/glenn/category/dmv-queries/

3.Check wait stats

Use Paul Randal’s DMV  https://www.sqlskills.com/blogs/paul/wait-statistics-or-please-tell-me-where-it-hurts/

4.Use Whoisactive

Use Adam Machanic’s script https://sqlserverblogforum.com/dba/whoisactive-capturing-a-sql-server-queries-performance-tuning/

5.Use SP_BiltZ

Use Brent Ozar’s script https://www.brentozar.com/blitz/

6.Use server side trace

https://sqlserverblogforum.com/dba/how-to-use-server-side-trace-to-capture-running-query-t-sql/

7.Use extended events

https://blog.sqlauthority.com/2010/03/29/sql-server-introduction-to-extended-events-finding-long-running-queries/

8.Use actual execution plan, if you have query

In SSMS, check mark the actual execution plan and run the query to tune further.

9.Use query store, if SQL version is above 2016

10.Use query store

https://docs.microsoft.com/en-us/sql/relational-databases/performance/best-practice-with-the-query-store?view=sql- server-ver15

For SQL azure PaaS use insight dashboard

I will try to write separate post of 10 steps.