Every slow query investigation eventually arrives at the same place: the EXPLAIN output. It is the single most information-dense tool
Continue readingReading the Plan: What EXPLAIN ANALYZE Is Actually Telling You
Every Go service that talks to PostgreSQL sits on top of a pool, and almost every incident review that mentions
Continue readingConnection Pooling Is a Queue: Sizing pgxpool Against PostgreSQL’s Process Model
Every relational database ships an isolation level selector, and most applications pick whatever the default is and move on. That
Continue readingSnapshot Isolation and Write Skew: What Your Database Actually Promises
The migration that works on staging and melts down production usually dies in the lock queue. Someone runs an ALTER
Continue readingZero-Downtime Schema Migrations: Expand-Contract on PostgreSQL, Step by Step
Every database you use is a B-tree or an LSM tree underneath. PostgreSQL and MySQL’s InnoDB are B-trees. RocksDB, Cassandra,
Continue readingB-Trees vs LSM Trees: The Storage Engine Trade-Off Behind Every Database
Every Go service that talks to PostgreSQL ends up managing a pool of database connections, and almost every team gets
Ask a PostgreSQL database administrator what kills databases in production and you’ll hear about wraparound — the event where a
Replica lag is one of those distributed-systems facts everyone accepts in the abstract and nobody plans for in the code.
Every team seems to arrive at the same configuration at some point: the database feels slow, someone searches for a
Continue readingConnection Pool Sizing: The Math That Says Fewer, Not More
Offset pagination is the first thing everyone learns and the first thing that falls over in production. The product manager
Continue readingBeyond OFFSET: Keyset Pagination in PostgreSQL That Actually Scales