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 moreIn the world of database administration, index maintenance is a necessary evil. Done right, it keeps your queries snappy; done wrong, it becomes a resource-hungry monster that eats your maintenance window alive.
Read moreWhen investigating performance degradation in SQL Server, we often look at missing indexes, outdated statistics, or bloated execution plans. However, sometimes the root cause lives entirely outside the database engine...
Read moreIn 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 moreRecently, 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
Read moreThis is one of our tuning successes, particularly for the nightly process of loading data into a report server from the main database.
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