Slow reports, slow transactions, and the internal team could not find why. In this case study, MAXDOP = 1 was quietly slowing down the entire business.
SQL Server 2022 – Degree of Parallelism (DOP) Feedback for Optimize Query Performance
SQL Server 2022 introduces a powerful new feature called Degree of Parallelism (DOP) feedback as part of the Intelligent Query Processing (IQP).
Configuring Parallel Index Operations in SQL Server
MAXDOP limits supported parallel index operations without changing unrelated instance settings. I choose the ceiling from the maintenance workload.
3 Ways to Configure MAXDOP – SQL in Sixty Seconds #166
We will see a quick SQL in Sixty Seconds video and scripts used in the video to change MAXDOP. Let us watch 3 Ways to Configure MAXDOP.
Threads With Zero Rows in a Parallel Plan, Measured
A parallel plan can show threads with zero rows, and that is normal. This post reads the per-thread row counters of two real plans on SQL Server 2025 and shows where the empty threads come from. It also says when an empty thread points to a real problem.
DBREINDEX and MAXDOP: Use ALTER INDEX to Limit Parallelism
DBREINDEX and MAXDOP do not combine: DBCC DBREINDEX has no MAXDOP option, so it follows the server setting. This post shows the three errors, rebuilds a demo index with ALTER INDEX at different MAXDOP values, and measures the degree of parallelism each one used.
SQL SERVER – 3 Different Ways to Set MAXDOP
There are 3 different MAXDOP scopes: instance, database and statement. Readers of my 16-versus-1 demonstration asked where to configure it.