A PostgreSQL read-only user that returns permission denied almost always has one of three missing grants: CONNECT on the database, USAGE on the schema, or SELECT on the tables. All three are required — missing any one of them blocks access completely. This guide fixes it with copy-paste commands verified on PostgreSQL 16. The Challenge: Read more about PostgreSQL Read-Only User: Complete Permission Setup Guide[…]
Last Updated: December 10, 2025Tested On: RHEL 9.3, PostgreSQL 16.1 PostgreSQL 16 is the stable release of the powerful open-source relational database system, offering enhanced performance, security, and new features. This comprehensive guide walks you through installing PostgreSQL 16 on RHEL 9 with step-by-step instructions, commands, and best practices. Why Upgrade to PostgreSQL 16 on Read more about Install PostgreSQL 16 on RHEL 9 [Tested dnf Steps][…]
Understanding PostgreSQL Configuration Parameters PostgreSQL’s default configuration rarely fits production workloads. Whether you’re managing a small application database or an enterprise data warehouse, knowing which PostgreSQL configuration parameters to adjust can mean the difference between sub-second queries and application timeouts. In this guide, we’ll cover the essential PostgreSQL configuration parameters that directly impact performance, with Read more about PostgreSQL Configuration Parameters: Essential Settings Guide[…]
Why Enable Timing in PSQL? When optimizing your SQL queries, it’s crucial to measure their execution time to understand their performance. Enabling timing in psql lets you see how long a query takes to execute. Why Turn Off the Pager? By default, psql uses a pager (like less) to display query results when the output Read more about Enable psql Timing and Disable Pager Permanently[…]
This is in continuation of My last blog about Meta Commands in PostgreSQL. In last blog I have explained what a Meta command and how to list databases. In next few blogs we will explore few of Meta commands. Lets start exploring schemas. Visit this series of last blog for other command. The command we Read more about PostgreSQL Meta-Command using psql: Command Information -IV[…]
This guide covers how to install PostgreSQL 16 on Ubuntu 22.04 LTS using the official PGDG repository — the same method used in production environments. Commands are verified on Ubuntu 22.04 (Jammy). The original 2021 post covered Ubuntu 18.04 + PostgreSQL 11, both now EOL. Environment note: Commands below are verified on Ubuntu 22.04 LTS Read more about Install PostgreSQL 16 on Ubuntu 22.04: Step-by-Step[…]