Postgresql

The ANALYZE command in PostgreSQL is used to collect statistics about the contents of tables and indexes. These statistics are essential for the query planner to generate efficient query execution plans, improving the overall performance of database queries. By gathering data on the distribution of values in each column, PostgreSQL can optimize how it executes …

If you often work with PostgreSQL queries, you know that sometimes the raw output can be difficult to read, especially when you’re dealing with long queries or large datasets. Fortunately, PostgreSQL provides several ways to format and organize your query results for better readability. In this article, we will explore five practical methods to make …

The SET command in PostgreSQL is used to configure session-level parameters. Unlike global configuration changes, which affect the entire PostgreSQL server and require administrative access, the SET command allows users to modify settings that are valid only for the current session. This command is extremely useful for temporary adjustments or tuning parameters for specific queries …

In PostgreSQL, SET and ALTER are two SQL commands that can be used to modify configuration settings, but they differ in their scope, persistence, and use cases. SET Command The SET command is used to temporarily change a configuration parameter within a session. When you use SET, the change will only apply to the current …

Introduction Updating PostgreSQL server configurations is a critical part of database administration. While the simplest method to update configurations is by modifying the postgresql.conf file and restarting the server, this approach can cause downtime, which is especially problematic in high-availability setups or production environments with only a single server running. Fortunately, not all configuration parameters …

In PostgreSQL, managing sessions is crucial for ensuring smooth database performance. Whether a query is running too long, a session is blocking other processes, or you need to clean up idle connections, knowing how to kill a PostgreSQL session can help you resolve these issues. In this guide, we’ll walk you through the steps to …

Understanding when a table was last accessed or modified in PostgreSQL is crucial for various reasons, such as database optimization, troubleshooting, and auditing. In PostgreSQL 16, there are several ways to determine when a table was last read, and even some methods to estimate when it was last written. This article explains how to retrieve …

Determining whether a table is actively used or has become obsolete is an important task in database management. PostgreSQL offers various techniques to assess table usage, helping administrators optimize resources and identify potential candidates for archival or removal. Real-time Monitoring with pg_stat_user_tables The pg_stat_user_tables system view is a valuable resource for monitoring table activity in …

Effectively monitoring running queries in a PostgreSQL database is essential for maintaining performance and ensuring smooth operations. In this article, we will explore various techniques and tools available to check the status of your queries, gain valuable insights into their execution, and troubleshoot any potential performance issues. Leveraging the pg_stat_activity View The pg_stat_activity system view …

In PostgreSQL, query blocking occurs when one query is waiting for a resource held by another query, resulting in performance bottlenecks. This article explores techniques for identifying active or blocked queries in PostgreSQL and pinpointing the source of the block. By following the methods outlined below, you can effectively troubleshoot and resolve query blocks to …