Database Animations: Why Higher Maxdop Equals More TempDB Spills
Read OriginalThis article by Brent Ozar explains the relationship between Max Degree of Parallelism (MaxDOP) and TempDB spills in SQL Server. It clarifies that higher MaxDOP settings divide memory grants evenly across all parallel threads, increasing the risk of parallelism skew and memory spills, especially for queries with parameter sniffing. The author recommends setting both Cost Threshold for Parallelism and MaxDOP appropriately, and using sp_BlitzCache to identify spilling queries. Aimed at DBAs and developers, it provides practical tuning advice and links to related resources.
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