PostgreSQL 19 in Practice: Architecture, Replication, and Production-Grade Postgres Operations by Samir Chekkal
English | July 25, 2026 | ASIN: B0HBLHRMFT | 201 pages | EPUB | 7.07 Mb
Your cluster is fine until the day it isn't.
A query that ran in 8 ms starts taking 4 seconds after an upgrade. A table that should be 40 GB is 190 GB. The standby is nine minutes behind and nobody knows when that started. Autovacuum is running, and losing. A hundred blog posts cover each symptom; almost nothing explains how the pieces fit together.
PostgreSQL 19 in Practice is that explanation: an operator's field manual for the Postgres you actually run in production.
Architecture that explains behaviour - processes, shared memory, MVCC and snapshots, heap and TOAST layout, and the write-ahead log.
Query performance you can defend - reading EXPLAIN honestly, estimation errors, index selection, partitioning, and plan stability with pg_plan_advice .
Bloat under control - vacuum internals, parallel autovacuum , freezing and transaction ID wraparound, and native REPACK CONCURRENTLY .
Replication and HA as a design problem - streaming and logical replication, quorum commit, WAIT FOR LSN for read-your-writes, failover and fencing, and point-in-time recovery drills.
Operations that hold - pg_stat_io, pg_stat_lock, pg_stat_recovery, asynchronous I/O tuning, security hardening, and an upgrade plan with a rollback.
Thirty-one chapters, eighteen diagrams, and six graded katas - from a runaway query to a zero-downtime major-version upgrade - plus a query cookbook, a configuration reference, and a glossary.
For DBAs, backend engineers, SREs, and platform teams who own a cluster other people depend on. You need SQL and a shell. You are not expected to have tuned autovacuum, built a replica, or run a failover before.
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