Schedule - pgDay Paris 2023
How to Tame a Mastodon: Lessons for PostgreSQL at Scale
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Managing and running PostgreSQL can pose interesting challenges when you’re operating databases at a large scale. This talk will cover some of the things I’ve encountered in the last year working with a 25TB+ PostgreSQL database. I will be using an unnamed real life client case-study as a guide for problems encountered and general solutions and guidelines.
Environment includes: - 25TB database with significant growth - 15 replicas - WAL volume of 150GB/hr - Transaction volume of 230M+/hr on primary alone - Variable workload needs for different replicas
We will cover topics for DBA including: - Database tuning - WAL and replica management; backups strategies, WAL tools, bootstrapping new replicas - Issues encountered with such high transaction volumes, including MultiXact, vacuum tuning and challenges: what we had to change to get things working, etc - Indexing: identifying new indexes, creating them, and removing unused ones across the entire cluster