Functional indexes in PostgreSQL are a powerful feature that allows you to create an index on the result of a function or expression applied to one or more columns of a table. This feature provides […]
Cardinality in PostgreSQL and Its Impact on Query Performance In PostgreSQL, cardinality refers to the estimated number of distinct values in a column or the estimated number of rows returned by a query. Accurate cardinality […]
Deciphering PostgreSQL Query Optimization: Selectivity and Cardinality Estimation PostgreSQL’s query optimizer makes decisions about query plans based on selectivity and cardinality estimations. These estimations are critical for determining the most efficient way to retrieve data. […]
Introduction The PostgreSQL CAST operator is a versatile tool that plays a pivotal role in data type conversion and manipulation. Specifically, it allows developers and database administrators to explicitly transform data from one data […]
Introduction Optimizing database performance is crucial for efficient application functioning, and one of the key strategies to achieve this in PostgreSQL is through intelligent indexing. Indexing involves creating data structures that allow the database […]
Out-of-Memory (OOM) errors can be a significant concern when operating a PostgreSQL database. These errors occur when the system’s memory resources are exhausted, leading to degraded database performance, service disruptions, and even system crashes. Understanding the […]
Internally, PostgreSQL organizes data into data pages and data rows for efficient storage and retrieval. Let’s dive into the details of how these components work in PostgreSQL: 1. Data Pages -Storage:PostgreSQL stores data […]
PostgreSQL Performance tuning Caching is a crucial aspect of improving PostgreSQL’s performance by reducing the need to access disk storage for frequently accessed data. Moreover, efficient caching can significantly enhance query performance and response […]
SQL Aggregation in PostgreSQL- Introduction: Aggregation functions in PostgreSQL calculate values for groups of rows, summarize data, and provide meaningful insights. These functions help analyze data and generate reports by retrieving aggregated information from large […]
In PostgreSQL, maintaining the database plays a crucial role in optimizing performance and ensuring efficient storage use. Vacuuming is one of the key maintenance tasks that remove dead rows, reclaim space, and improve query performance. […]
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