PostgreSQL Index Usage and Optimization

PostgreSQL Index Usage and Optimization Indexing is the single biggest lever in SQL performance, and it is also the category where most of the bad advice lives. "Add an index" solves a narrow class of problems. "Add the right index, in the right shape, for the right query, and drop the ones you don't need" is the actual job — and it's more design work than most teams expect. This is article 2 in a series on PostgreSQL query analysis. The pillar is The Complete Guide to PostgreSQL SQL Query Analy