DOP and Tipping Points In SQL Server
In this video, I delve into the fascinating world of DOP (Degree of Parallelism) and its tipping points, which I affectionately call "DOPing points." By exploring a specific query scenario, I demonstrate how the optimizer's cost model changes with different DOP settings, leading to varying execution plans. I walk you through a series of queries and indexes, showing how the optimizer decides between key lookups and scans, and how these decisions can be influenced by the number of parallel threads. This video is packed with insights that can help you better understand query optimization and make informed decisions about DOP settings in your SQL Server environments. CHAPTERS 00:00:00 - Introduction 00:01:05 - DOPing Points Explained 00:03:20 - Query Cost Analysis 00:05:50 - Tipping Points and DOP 00:07:35 - Conclusion ━━━━━━━━━━━━━━━━━━━━━━━━━━ 🕵️♂️ FREE SQL SERVER MONITORING & Plan Analysis ━━━━━━━━━━━━━━━━━━━━━━━━━━ https://github.com/erikdarlingdata/PerformanceMonitor https://github.com/erikdarlingdata/PerformanceStudio https://plans.erikdarling.com/ ━━━━━━━━━━━━━━━━━━━━━━━━━━ 📚 TRAINING & COURSES ━━━━━━━━━━━━━━━━━━━━━━━━━━ Get AI-Ready With Erik https://training.erikdarling.com/get-ai-ready-with-erik?coupon=AIREADY SQL Server Performance Engineering Course https://training.erikdarling.com/sql-server-performance-engineering?coupon=ENGINEERING Learn T-SQL with Erik https://training.erikdarling.com/learn-t-sql-with-erik?coupon=ADVANCEDTSQL Everything Bundle: https://training.erikdarling.com/?coupon=SPRINGCLEANING ━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ CONSULTING & SERVICES ━━━━━━━━━━━━━━━━━━━━━━━━━━ Need SQL Server performance help? https://training.erikdarling.com/sqlconsulting ━━━━━━━━━━━━━━━━━━━━━━━━━━ 💬 CONNECT ━━━━━━━━━━━━━━━━━━━━━━━━━━ Ask questions at Office Hours https://erikdarling.com/officehours/ Become a channel member https://www.youtube.com/@ErikDarlingData/join