Indexing
Audit Single vs Multi-Column Indexes in PostgreSQL
Apr 16, 2026 / · 4 min read · postgresql administration indexing database pg_index pg_class pg_namespace ·Audit Single vs Multi-Column Indexes in PostgreSQL Not all indexes are created equal. A single-column index covers one column and is simple to reason about. A multi-column (composite) index covers two or more columns and can serve a wider range of queries — but only when the leading columns match the query filter. As a …
Read MoreFind Missing Indexes in PostgreSQL with SQL
Apr 4, 2026 / · 3 min read · postgresql performance optimization indexing database pg_stat_user_tables pg_stat_all_tables ·How to Find Missing Indexes in PostgreSQL A missing index means PostgreSQL reads every row in a table to find what it needs. This is called a sequential scan. For small tables, that is fine. For large tables, it is slow and wastes CPU and I/O. PostgreSQL tracks sequential scans in the pg_stat_all_tables view. You can …
Read MoreFind PostgreSQL Index Bloat and Wasted Space
Mar 31, 2026 / · 5 min read · postgresql performance indexing optimization database pg_class pg_index pg_namespace pg_stats pg_am pg_attribute pg_stat_user_indexes ·How to Find Index Bloat and Wasted Space in PostgreSQL Just like tables, PostgreSQL indexes can become bloated over time. When rows are updated or deleted, the old index entries are not removed immediately. They stay in the index as dead entries, wasting space and slowing down index scans. B-tree indexes are the most …
Read MoreMonitor PostgreSQL Index Build Progress with SQL
Mar 30, 2026 / · 4 min read · postgresql administration indexing monitoring database pg_stat_activity pg_stat_progress_create_index ·How to Monitor PostgreSQL Index Build Progress Building an index on a large table can take minutes or even hours. Without progress tracking, it is hard to know if the build is almost done or barely started. PostgreSQL 12 introduced the pg_stat_progress_create_index view to fix this. It shows real-time progress for any …
Read MoreIdentifying Unused PostgreSQL Indexes to Declutter & Optimize
Apr 10, 2024 / · 3 min read · postgresql performance optimization database indexing pg_statio_user_indexes pg_stat_all_indexes ·Understanding Your PostgreSQL Index Cache Hit Ratio: Optimizing Performance In PostgreSQL, keeping frequently accessed data readily available is crucial for optimal query performance. Indexes act as shortcuts, enabling the database to locate specific data within tables faster. The PostgreSQL cache plays a vital role in …
Read MoreUnderstanding Your PostgreSQL Index Cache Hit Ratio
Apr 9, 2024 / · 3 min read · postgresql performance optimization database indexing pg_stat_all_indexes ·Identifying Unused Indexes in PostgreSQL: Optimizing Storage and Performance In PostgreSQL, indexes act as shortcuts, accelerating data retrieval within tables. However, unused indexes can become a burden, consuming storage space and potentially impacting performance. This article explores a PostgreSQL code snippet …
Read MorePostgreSQL Index Cardinality: A Guide to Understanding Index Efficiency This blog post delves into the world of PostgreSQL index cardinality, a crucial metric for optimizing database performance. We'll dissect the provided SQL code, explain its purpose, and equip you with valuable insights to make informed decisions …
Read MoreMonitor PostgreSQL Index Usage for Speedy Queries
Mar 17, 2024 / · 3 min read · postgresql database performance optimization indexing pg_stat_user_tables pg_stat_user_indexes ·Monitoring PostgreSQL Index Usage: Keeping Your Queries Speedy In the fast-paced world of web applications, ensuring efficient database queries is paramount. PostgreSQL's powerful indexing capabilities play a crucial role in achieving optimal performance. This post delves into a SQL query that helps you monitor index …
Read More