You’ve run into a classic system administrator puzzle. You need to stop your PostgreSQL database, so you type the standard command: sudo systemctl stop postgresql-14. The command finishes without any errors, but when you check the running processes, the database…
When working with databases, one of the most common questions you may find yourself asking is, “How many rows are in this table?” In PostgreSQL, the answer might not be as straightforward as it seems at first glance. Although the…
PostgreSQL, as one of the most advanced and widely used relational database management systems (RDBMS), offers a range of system views that can be utilized for monitoring and diagnosing database operations. These system views provide insights into the internal state…
The max_wal_size parameter in PostgreSQL is a critical setting that directly impacts the Write-Ahead Log (WAL) system, influencing both write performance and recovery time. It controls the maximum amount of WAL data that can accumulate before a checkpoint is triggered,…
As a Database Administrator (DBA), my role revolves around ensuring the performance, integrity, and availability of the databases I manage. This involves tasks like designing efficient schemas, troubleshooting performance issues, monitoring system health, and analyzing logs. However, managing large, complex…
PostgreSQL is a powerful, open-source relational database management system (RDBMS) widely used for managing structured data. The underlying architecture of a PostgreSQL database consists of various structural objects, each playing a specific role in data storage, organization, and management. Understanding…
In PostgreSQL, partitioning is a technique used to manage large tables by splitting them into smaller, more manageable pieces. This helps to improve query performance, manageability, and maintenance operations. There are two main types of partitioning: vertical partitioning and horizontal…
PostgreSQL is a powerful, open-source relational database management system known for its flexibility, extensibility, and performance. One of the key factors in ensuring optimal database performance is configuring PostgreSQL correctly to match the specific needs of your workload. The PostgreSQL…
Subqueries, also known as nested queries, are queries embedded within other SQL queries. In PostgreSQL, subqueries are a powerful tool to help filter, manipulate, and aggregate data dynamically. They allow you to perform complex data retrieval operations without the need…
In PostgreSQL, managing access privileges is an essential part of database administration, especially in multi-user environments. One of the most useful commands for viewing and managing access privileges for database objects (such as tables, views, sequences, etc.) is the \dp…
