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If users complain that application is very slow, what all things should we check? The first thing that comes to my mind is blocking.
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You need to provide more information my friend, this is like asking my computer is not working, what should I check?
Would like to know the troubleshooting approach
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Hi ChaitanyaKiran-2787,
Please also refer to this article to check for any network issues and application issues that are causing SQL Server application performance issues.
Best Regards,
Amelia
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See perhpas these links
sql profiler
https://stackify.com/performance-tuning-in-sql-server-find-slow-queries/
how to identity sql query who are slow
https://www.sqlshack.com/how-to-identify-slow-running-queries-in-sql-server/
If you have activated Query Store, go into SSMS and check for top resource-consuming queries. If you haven't activated Query Store, do so, and check in a couple of hours later.