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Few days ago I have noticed that there will be a change (again) in certification paths for next generation of SQL servers. So I would like to recommend some thoughts about this from Microsoft Certified Masters (MCM) of Brent Ozar PLF Company.

More tips and tricks

Load Factor – Uneven load distribution
by Michal Kovaľ on 15/06/2022

Recently, we found an interesting pattern during exploring one of our SMT graphs while doing a health check of a SQL server. The following graph shows us the Load Factor attribute. The value came from system table sys.dm_os_schedulers, which the SMT tool

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When SQL Server 2022 Talks Too Much to Windows: Solving the PREEMPTIVE_OS_QUERYREGISTRY Mystery
by Michal Kovaľ on 28/05/2026

You open your performance analytics tool to check the top wait types, expecting the usual suspects like PAGEIOLATCH or CXPACKET. Instead, staring back at you is a strange, rarely seen wait type: PREEMPTIVE_OS_QUERYREGISTRY.

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The power of SMT data and how we put together Index changes report.
by Michal Tinthofer on 10/09/2021

There are usually multiple ways how to provide a view of a set of data as a report, involving decisions like; keep it easy to read, interpret the relationships between multiple figures in the correct way and to show user as much information as possible at

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