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Tag: planetpostgresql
03 September 2024
Quick Benchmark: ANALYZE vs. maintenance_io_concurrency
Introduction Running ANALYZE (either explicitly or via auto-analyze) is very important in order to have uptodate data statistics for the Postgres query planner. In particular after in-place upgrades via pg_upgrade, ANALYZE needs to be run in order to have any query statistics at all. As ANALYZE samples only parts of the blocks in a table […]
26 March 2024
Bloat of internal tables due to frequently created and dropped relations
Overview Tables that are created and dropped on demand, whether they are temporary or regular, are frequently used by application developers in PostgreSQL to simplify the implementation of various functionalities and to expedite responses. Numerous articles on the internet describe the advantages of using such tables for storing search results, precalculating figures for reports, importing […]
22 February 2024
Quick Benchmark: PostgreSQL 2024Q1 Release Performance Improvements
The PostgreSQL 2024Q1 back-branch releases 16.2, 15.6, 14.11, 13.14 and 12.18 on February 8th 2024. Besides fixing a security issue (CVE-2024-0985) and the usual bugs, they are somewhat unique in that they address two performance problems by backporting fixes already introduced into the master branch before. In this blog post, we describe two quick benchmarks […]
05 May 2022
Moodle PostgreSQL load balancing with HAProxy and Patroni
Moodle is a popular Open Source online learning platform. Especially since the beginning of the COVID-19 pandemic the importance of Moodle for schools and universities has further increased. In some states in Germany all schools had to switch to Moodle and other platforms like BigBlueButton in the course of a few days. This leads to […]
08 March 2022
SQLreduce: Reduce verbose SQL queries to minimal examples
SQLreduce: Reduce verbose SQL queries to minimal examples Developers often face very large SQL queries that raise some errors. SQLreduce is a tool to reduce that complexity to a minimal query. SQLsmith generates random SQL queries SQLsmith is a tool that generates random SQL queries and runs them against a PostgreSQL server (and other DBMS […]