A slow query arrives. Someone runs EXPLAIN ANALYZE, pastes the output into a search engine, and a verdict comes back:
Continue readingReading EXPLAIN ANALYZE Like a Planner: A PostgreSQL Field Guide
Ask a PostgreSQL database administrator what kills databases in production and you’ll hear about wraparound — the event where a
Every schema migration is easy the first time, when the table is empty and the only user is your test
Continue readingZero-Downtime PostgreSQL Migrations: Locks, Rewrites, and Expand-and-Contract
# POST 2: Reading EXPLAIN A query that ran in 20 milliseconds yesterday takes 40 seconds today. Nothing in the
Continue readingReading EXPLAIN Like a Planner: Debugging Slow Queries in PostgreSQL
Every PostgreSQL developer knows the four isolation levels from the SQL standard: Read Uncommitted, Read Committed, Repeatable Read, Serializable. Fewer
Continue readingPostgreSQL Isolation Levels: What Repeatable Read Actually Guarantees
PostgreSQL takes an ACCESS EXCLUSIVE lock for most ALTER TABLE operations. That lock conflicts with everything — reads, writes, even
Every UPDATE in PostgreSQL is secretly an INSERT-plus-a-tombstone. The old row version stays on disk, fully readable to any transaction
Continue readingMVCC and VACUUM in PostgreSQL: Dead Tuples, Autovacuum Tuning, and What PG18 Changed
Every slow query investigation eventually reaches the same moment: you run EXPLAIN ANALYZE, and the plan makes no sense. Postgres
Continue readingReading EXPLAIN ANALYZE: Why Postgres Ignores Your Index
PostgreSQL versus MySQL is one of the oldest rivalries in software, and like most old rivalries it is mostly narrated
Continue readingPostgreSQL vs MySQL in 2026: A Practitioner’s Comparison
Most applications don’t need a database server. They need durable, queryable state — and somewhere along the way the industry
Continue readingSQLite in Production: The Database You Already Ship