What is pg_resetwal? pg_resetwal (formerly known as pg_resetxlog) is an advanced PostgreSQL utility that is used to reset the write-ahead log (WAL) and other control information of a PostgreSQL database cluster. This tool is typically used in scenarios where the WAL has become corrupted due to a hardware failure, file system corruption, or other catastrophic …
What is pg_controldata? pg_controldata is a diagnostic tool included with PostgreSQL that allows users to display control information of a PostgreSQL database cluster. This control information is stored in a file named pg_control within the cluster’s data directory and contains essential data about the database’s state, such as checkpoint information, database system identifier, and the …
What is pg_config? pg_config is a command-line utility included with PostgreSQL that provides information about the installed version of PostgreSQL. It can display various configuration parameters, such as the location of installed headers, libraries, and version information, which can be particularly useful for compiling and installing other PostgreSQL extensions or client applications. How pg_config Works …
What is dropuser? dropuser is a command-line utility provided by PostgreSQL designed to remove a user (role) from a PostgreSQL database cluster. It serves as a convenient wrapper for the DROP ROLE or DROP USER SQL command, allowing database administrators to easily remove users without the need to manually execute SQL commands within the PostgreSQL …
What is createuser? The createuser utility is a command-line tool provided by PostgreSQL that simplifies the process of creating new user accounts (also known as roles) within a PostgreSQL database cluster. It acts as a front-end to the CREATE ROLE SQL command, offering a user-friendly interface for defining user privileges and attributes without directly executing …
What is dropdb? dropdb is a command-line utility that comes with PostgreSQL, designed to remove an existing database from a database cluster. It is effectively a convenient wrapper for the SQL command DROP DATABASE, providing an easier and quicker way for database administrators and users to delete databases without having to manually execute SQL commands …
What is createdb? createdb is a command-line utility provided by PostgreSQL that simplifies the process of creating a new database within an existing database cluster. It serves as a wrapper around the SQL command CREATE DATABASE, offering a convenient way for users and administrators to create databases without directly interacting with the PostgreSQL command prompt. …
What is initdb? initdb is a fundamental PostgreSQL utility used to create a new PostgreSQL database cluster. A database cluster is a collection of databases that are managed by a single PostgreSQL server instance. initdb initializes the data storage area or data directory where the database cluster’s files will reside, setting up the necessary file …
What is pg_ctl? pg_ctl is a command-line utility that is part of the PostgreSQL distribution. It is used to start, stop, restart, and control other aspects of the PostgreSQL server (postmaster), making it an essential tool for database administrators for managing the database service. How pg_ctl Works pg_ctl directly interfaces with the PostgreSQL server process, …
What is pg_restore? pg_restore is a utility for restoring a PostgreSQL database from an archive file created by pg_dump in one of the non-plain-text formats, such as custom, directory, or tar format. This tool is essential for reconstructing databases, allowing for flexibility in object selection, parallel restoration, and data integrity checks during the recovery process. …