PostgreSQL

Today encountered an interesting case where a customer reported database connection issues caused by extensions.

Change Data Capture is an interesting ETL alternative solution.

Snapshot isolation does most of the heavy lifting in PG, but locks still matter. Here’s a practical guide to table locks, row locks, intention locks, and `pg_locks`.

When GIN indexes are used to search with very long keyword lists, performance degrades significantly. This article explains why GIN index keyword search has O(n^2) time complexity.

Replication is one of the core issues in system architecture.

There are various backup strategies. Physical backups can usually be divided into four types.

Sometimes, interactions between components manifest in subtle ways. For example, using pg_dump to export data from a connection pool can cause connection pool contamination issues.

Using binary editing to repair PostgreSQL data pages, and how to make a primary key query return two records.

PostgreSQL uses MVCC as its primary concurrency control technology. While it has many benefits, it also brings other effects, such as relation bloat.

TimescaleDB is a PostgreSQL extension plugin that provides time-series database functionality.