Contact Us

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

Is model db important?
by Michal Tinthofer on 15/02/2012

Few days ago I have been asked for help in process of installation a SCOM. Admins wasn’t been able to install some parts of this system because installation wizards reports some unexpected errors. When I arrived to the SQL instance I found something inte

Read more
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.

Read more
The Symmetry of Performance: Solving CPU Wait Spikes by Disabling Soft-NUMA
by Michal Kovaľ on 17/02/2026

In high-performance SQL Server environments, how you "slice" your CPU resources is just as important as how many cores you have. We recently tackled a case where a customer was plagued by high SOS_SCHEDULER_YIELD and CXPACKET waits.

Read more