PostgreSQL
Posts in “PostgreSQL”.
PostgreSQL EXPLAIN ANALYZE: How to Read Query Plans
Learn how to read PostgreSQL EXPLAIN ANALYZE output, compare planner estimates with actual rows, interpret loops and buffers, and diagnose slow queries.
September 12, 2026 · 9 min read
Mobin Yazdanparast
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
Understanding PostgreSQL EXPLAIN
Learn to read PostgreSQL EXPLAIN output: cost, rows, and actual time, scan and join nodes, BUFFERS, and the red flags that point to missing indexes or stale statistics.
September 10, 2026 · 9 min read
Mobin Yazdanparast
PostgreSQL Query Optimization: A Step-by-Step Guide
A practical, step-by-step workflow for PostgreSQL query optimization: find slow queries, read plans with EXPLAIN ANALYZE, apply proven fixes, and verify results.
September 6, 2026 · 13 min read
Mobin Yazdanparast
PostgreSQL Index Performance Tuning: Practical Guide
A practical guide to PostgreSQL index performance tuning: diagnose slow queries with EXPLAIN ANALYZE, choose the right index type, and eliminate bloat and unused indexes.
September 5, 2026 · 10 min read
Mobin Yazdanparast
How to Find Missing Indexes in PostgreSQL: 5 Proven Methods
A practical, four-step workflow for PostgreSQL missing index detection using pg_stat views, pg_stat_statements, EXPLAIN (ANALYZE, BUFFERS), and log-based tools — plus a checklist for creating the right index.
September 4, 2026 · 10 min read
Mobin Yazdanparast
Find Unused Indexes in PostgreSQL: A Quick Guide
Learn how to find unused indexes in PostgreSQL using pg_stat_user_indexes. Improve database performance and reduce bloat with our step-by-step guide.
September 3, 2026 · 7 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 Unique Index vs Unique Constraint: Which to Use?
Every PostgreSQL unique constraint is enforced by a unique index, but not every unique index backs a constraint. Learn the real differences, the SQL for each, and when to use which.
September 1, 2026 · 8 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