Indexes and Fillfactor in PostgreSQL: Power, Trade-offs, and the Cost of Speed
Resumo: Indexes are one of the first performance tools every PostgreSQL user learns — and one of the easiest ways to accidentally slow a system down. This article explains how indexes actually work, why they are never free, how different index types behave in real workloads, and how fillfactor quietly determines whether your database ages gracefully or slowly collapses under write pressure. Indexes Feel Like Magic (At First) You run a query on a table with millions of rows. ...