pg_isready:tldr:7e502

The command "pg_isready --quiet" is used to check the status of a PostgreSQL database server and determine if it is accepting connections. Here is an explanation of the command and its options:

• "pg_isready" is the name of the command-line utility that comes with PostgreSQL.
• "--quiet" is an option that tells the command to run in a silent mode, without printing any additional information except the exit status.

By running "pg_isready --quiet", the command will attempt to connect to the local or remote database server and check if it is ready to accept connections. It will then print a short message indicating the current status:

• "accepting connections" means that the server is up and running, and it is ready to accept connections.
• "rejecting connections" means that the server is running but currently not accepting connections, usually due to being in a maintenance mode or other configuration settings.
• "no response" means that the server is not accessible or not running.

The command is often used in scripts or automated monitoring to check the availability of a PostgreSQL database before performing any database operations. Since it runs silently with the "--quiet" option, the result can be easily used in conditional statements or further processing within the script.