Query Performance Tuning

[!NOTE] This module explores the core principles of Query Performance Tuning, deriving solutions from first principles and hardware constraints to build world-class, production-ready expertise.

1. Module Contents

  1. Execution Plans - Master EXPLAIN, understand Seq Scan vs Index Scan, and optimize costs.
  2. Join Algorithms - Understand Nested Loop, Hash Join, and Merge Join strategies.
  3. Statistics Collector - Learn how pg_stats, histograms, and MCV lists affect the planner.
  4. Review & Cheat Sheet - Flashcards and a quick reference for query performance tuning.

Module Chapters