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May 15, 2016 · Databases

Unlocking SQL Server Parallel Query Execution: Concepts, Plans, and Practical Tips

SQL Server’s parallel query execution leverages multiple CPUs to accelerate CPU‑bound workloads, and this article explains the underlying hardware prerequisites, scheduler/task/worker model, serial vs parallel plans, exchange operators, parallel joins, CXPACKET waits, and configuration settings such as cost threshold and max degree of parallelism.