PostgreSQL B-Tree Index Explained: How It Really Works
How the PostgreSQL B-tree index works: page structure, search and write behavior, and production maintenance with fillfactor, pgstattuple, amcheck, and REINDEX CONCURRENTLY.
September 11, 2026 · 9 min read
Mobin Yazdanparast
PostgreSQL Index Scan vs Sequential Scan Explained
Understand when PostgreSQL chooses an index scan vs sequential scan, how the query planner estimates costs, and how to tune scan behavior for faster production queries.
September 2, 2026 · 11 min read
Mobin Yazdanparast
PostgreSQL Expression Indexes Explained (With Examples)
A practical guide to the PostgreSQL expression index: syntax, the IMMUTABLE requirement, exact planner matching, JSONB and date_trunc examples, and the write-amplification trade-off.
August 31, 2026 · 9 min read
Mobin Yazdanparast
PostgreSQL BRIN Index Explained: A Complete Guide
A deep dive into PostgreSQL BRIN indexes: how they work, when to use them over B-tree, and how to configure them for large table optimization with minimal storage overhead.
August 20, 2026 · 9 min read
Mobin Yazdanparast
PostgreSQL Hash Index Explained: When to Use It
Explore the PostgreSQL hash index, its internal mechanics, limitations, and specific use cases for exact match queries to optimize your database performance.
August 7, 2026 · 8 min read
Mobin Yazdanparast
How PostgreSQL Index Internals Actually Work
A deep dive into PostgreSQL index internals, exploring B-tree architecture, CTID heap mapping, MVCC visibility, and scan operations.
August 5, 2026 · 9 min read
Mobin Yazdanparast
What Is a Database Index? A Beginner's Guide
A clear explanation of what a database index is, how it improves data retrieval speed, and the structural trade-offs involved in SQL index creation.
August 4, 2026 · 9 min read
Mobin Yazdanparast