Tag : costing - SentryOne Team Blog

Tag: costing

Itzik Ben-Gan : Optimization Thresholds : Grouping and Aggregating Data, Part 5

Itzik Ben-Gan : Optimization Thresholds : Grouping and Aggregating Data, Part 5

In the conclusion of his series on grouping and aggregation costs, Itzik Ben-Gan reveals some of the math behind seek vs. scan decisions.

Itzik Ben-Gan : Optimization Thresholds : Grouping & Aggregating Data, Part 4

Itzik Ben-Gan : Optimization Thresholds : Grouping & Aggregating Data, Part 4

In the fourth installment of his series on optimization thresholds, Itzik Ben-Gan looks at how SQL Server applies costs to parallel operations.

Itzik Ben-Gan : Optimization Thresholds : Grouping & Aggregating Data, Part 3

Itzik Ben-Gan : Optimization Thresholds : Grouping & Aggregating Data, Part 3

Itzik Ben-Gan dissects the Hash Match (Aggregate) algorithm in his latest post in a series on SQL Server optimization thresholds.

Itzik Ben-Gan : Optimizer Thresholds : Grouping & Aggregating, Part 2

Itzik Ben-Gan : Optimizer Thresholds : Grouping & Aggregating, Part 2

Continuing his series on optimization thresholds, Itzik Ben-Gan dives into the costs behind stream aggregates when the data needs to be sorted first.

Itzik Ben-Gan : Optimizer Thresholds : Grouping & Aggregating, Part 1

Itzik Ben-Gan : Optimizer Thresholds : Grouping & Aggregating, Part 1

For his first post on SQLPerformance.com, Itzik Ben-Gan shows you how to reverse engineer optimizer costing for a Stream Aggregate operator.