Abu Hanif Staff Software Engineer HomePractical strategies for diagnosing slow queries with EXPLAIN ANALYZE and selecting the optimal index types for high-write workloads.
# Mastering PostgreSQL Indexing\n\nIndexes are the single highest-leverage lever for database scalability. This comprehensive guide reviews B-Tree, GIN, GiST, and BRIN indexes with real-world query execution examples.\n\n## 1. EXPLAIN (ANALYZE, BUFFERS)\nAlways inspect shared hit blocks and filter conditions before adding indexes. Avoid indexing low-cardinality columns without partial filters.\n\n## 2. Partial Indexes\nIndex only active rows (`WHERE is_active = true`) to minimize index footprint and accelerate the most frequent query patterns.
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