PGConf.Russia 2021

In May 2019, Postgres Professional launched the PostgreSQL certification program. I have been working in this company since March 2020, and in a year I have successfully taken four tests on the DBA1, DBA2, DBA 3, QPT courses. In this talk, I will share my experience of preparing for the exams and passing these tests.

Creation of a completely import-substituted component of the state information system using the example of the PUR KS - the "Electronic Budget" subsystem, the key state integrated information system for managing public finances. The presentation presents the subsystem architecture, performance optimization history and monitoring description. The speaker will talk about the advantages and difficulties of using an import-substituted system for the public sector, as well as about the nuances that departments should take into account when implementing open source solutions and solutions from Russian developers.

Mamonsu is an active monitoring agent for PostgreSQL based on Zabbix. Mamonsu 3.0 Major Update includes new metrics and more possibilities for data visualization via Zabbix screens. It also introduces the improved functionality of Mamonsu tools for interacting with the DBMS. In addition to the new functionality overview, I will also share the nuances of upgrading to the 3.0 version.

We maintain large PostgreSQL databases with the total data volume exceeding 180 TB. Every instance in the cluster gets a workload of 15 thousand requests per second. These circumstances certainly impose limitations on the classical approach to updating database structures. The cost of a DBA error gets higher, as even a small error can lead to a sleepless night) In my talk, I will cover our existing limitations for changes in the production environment, non-classical DBMS behavior under heavy workloads, and will discuss PostgreSQL in general.