It's Time to Get Rid of the Cost Threshold for Parallelism Setting. скачать в хорошем качестве

It's Time to Get Rid of the Cost Threshold for Parallelism Setting.

In this video, I delve into the outdated and largely unnecessary 'cost threshold for parallelism' setting in SQL Server. This setting has been around long enough to have outlived its usefulness and relevance in modern database management practices. I explain why relying on a fixed number for this setting is not only ineffective but also misleading, as it can lead to suboptimal query execution plans and resource overutilization. I argue that the focus should be on optimizing queries to run faster rather than obsessing over cost estimates, which are merely pre-execution metrics with no actual meaning in today's computing landscape. CHAPTERS 00:00:00 - Introduction 00:00:29 - Cost Threshold Overview 00:02:59 - Max Degree of Parallelism 00:03:04 - Setting Issues 00:04:18 - Estimated Costs vs Actual Costs 00:06:07 - Control Illusion 00:08:13 - Nested Loops Queries 00:09:28 - Intelligent Query Processing 01:00:45 - Future Directions --- In this video, I delve into the outdated and largely unnecessary 'cost threshold for parallelism' setting in SQL Server. This setting has been around long enough to have outlived its usefulness and relevance in modern database management practices. I explain why relying on a fixed number for this setting is not only ineffective but also misleading, as it can lead to suboptimal query execution plans and resource overutilization. I argue that the focus should be on optimizing queries to run faster rather than obsessing over cost estimates, which are merely pre-execution metrics with no actual meaning in today's computing landscape. CHAPTERS 00:00:00 - Introduction 00:00:29 - Cost Threshold Overview 00:02:59 - Max Degree of Parallelism 00:03:04 - Setting Issues 00:04:18 - Estimated Costs vs Actual Costs 00:06:07 - Control Illusion 00:08:13 - Nested Loops Queries 00:09:28 - Intelligent Query Processing 01:00:45 - Future Directions --- - TRAINING & COURSES - Get AI-Ready With Erik https://training.erikdarling.com/get-... SQL Server Performance Engineering Course https://training.erikdarling.com/sql-... Learn T-SQL with Erik https://training.erikdarling.com/lear... Everything Bundle: https://training.erikdarling.com/?cou... - CONSULTING & SERVICES - Need SQL Server performance help? https://training.erikdarling.com/sqlc... - CONNECT - Ask questions at Office Hours https://erikdarling.com/officehours/ Become a channel member    / @erikdarlingdata