PGConf.Russia 2023

My presentation "Explaining the Postgres Query Optimizer" covers the details of query optimization, optimizer statistics, joins, and indexes. This talk covers 40 other operations the optimizer can choose to handle complex queries, large data sets, and to enhance performance. These include merge append, gather, memoize, and hash aggregate. It explains their purpose and shows queries that can generate these operations.

This is a new talk; draft slides are at https://momjian.us/main/writings/pgsql/beyond.pdf

В докладе расскажем как мы храним объекты БД в системе контроля версий. Сравним традиционные подходы работы с миграциями БД и то, что понравилось нам. Расскажем о преимуществах и недостатках обоих методов. А потом мы представим наш инструмент для автоматизации процессов миграции и управления объектами БД - pgmig.

Of the relational databases, PostgreSQL is fairly unique in the indexing capabilities it offers. While most of us are familiar with the use of indexes to speed performance when filtering on columns, PostgreSQL indexes can do far more than this.

This talk will focus on cases where difficult problems were solved through the creative use of indexes. Each of these cases is from an episode in my career.

In this presentation, you will learn:

• The general index access methods PostgreSQL supports out of the box
• How the planner uses indexes (only on a high level)
• Functional indexes
• Creative use of Index Only scans.

This is a talk for all audiences. The talk is primarily for beginner to intermediate users, but should have enough information for more advanced users to get some insight or inspiration from the talk as well.

Разработчики pg_probackup расскажут о том, как работать с разнообразием команд pg_probackup. Покажут на примерах как делать FULL и инкрементальные бэкапы в разных режимах DELTA, PAGE, PTRACK. Продемонстрируют настройки политик резервного копирования для разных предметных областей от обслуживания сотни простых СУБД до e-commerce и fintech.