PostgreSQL Indexes: A Comprehensive Guide for Developers
By
dlt
4mo ago· 19 min readen
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Summary
This article provides a comprehensive introduction to PostgreSQL indexes for developers who understand the basic concept but want to learn about their internal workings, tradeoffs, and optimization. It covers how data is stored on disk, how indexes speed up data access, the costs associated with indexes (disk space, write operations, query planner, memory usage), and the different types of indexes available in PostgreSQL including Btree, Hash, BRIN, GIN, GiST, and SP-GiST. The article serves as an educational guide for developers looking to optimize database performance through proper index usage.
Key quotes
· 3 pulledIndexes are special database objects primarily designed to increase the speed of data access, by allowing the database to read less data from the disk.
This text is for developers that have an intuitive knowledge of what database indexes are, but don't necessarily know how they work internally, what are the tradeoffs associated with indexes, what are the types of indexes provided by postgres and how you can use some of its more advanced options to make them more optimized for your use case.
They can also be used to enforce constraints like primary keys, unique keys and exclus
Who’s this for Basics How data is stored in disk How indexes speedup access to data Costs associated with indexes Disk Space Write operations Query planner Memory usage Types of Indexes Btree Hash BRIN GIN GiST & SP-GiST Conclusion Who’s this
