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PostgreSQL indexes: simple rules that speed up your app

December 31, 20256 min read
Author: 7kar7son7Developer

When indexes help, when they hurt, and how to think about queries.

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TL;DR

  • postgres indexes basics
  • For apps with growing DB and slow lists/filters.

Who this is for

  • For apps with growing DB and slow lists/filters.

Keyword (SEO)

  • postgres indexes basics

When to add an index

  • Columns in WHERE/JOIN
  • Sorting/pagination
  • Query patterns

What not to index

  • Too many indexes slow writes
  • Low selectivity indexes
  • No query plan review

How to verify

  • EXPLAIN ANALYZE
  • p95 monitoring
  • Staging test with real data

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About the author

Developer at DevStudio.it. Focused on performance, SEO and production-ready web apps.

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