How a MySQL UPDATE Actually Works: InnoDB Internals Animated
Step-by-step animation of what happens inside MySQL when you run an UPDATE. From client packet to redo log fsync — every layer of InnoDB explained with interactive visualization.
MySQL EXPLAIN Output Explained: The Complete Guide (2026)
Every column of MySQL EXPLAIN output decoded with real examples from a 680K-row production database. Learn what each access type means, when to worry, and how to fix the slow ones.
How to Enable Checksums in PostgreSQL
A NetApp study found 400,000+ silent data corruptions across 1.5M drives. Learn how to enable PostgreSQL checksums at init, on existing clusters, and detect corruption before it reaches your backups.
How Do You Check Progress on PostgreSQL's Crash Recovery Process?
PostgreSQL 14's compactify_tuples optimization made crash recovery 2.4x faster. Learn 5 methods to monitor WAL replay progress, from pg_controldata to pg_stat_recovery_prefetch.
PostgreSQL Autovacuum Internals & Tuning Guide
At default settings, a 1 TB PostgreSQL table accumulates up to 200 GB of dead rows before autovacuum triggers. Learn how autovacuum's cost model works and how to tune it for production databases.
PostgreSQL Running Slow? A Step-by-Step Diagnostic Guide
Your PostgreSQL database is slow and you don't know why. This guide walks through a systematic diagnosis process — slow queries, EXPLAIN analysis, index auditing, and autovacuum.