PostgreSQL log management on Debian

PostgreSQL log management on Debian systems covers multiple aspects such as log configuration, viewing, rotation and storage location. This article will provide detailed descriptions of relevant steps and best practices.

PostgreSQL log configuration

In order to enable logging, the following parameters need to be modified in the postgresql.conf file:

• logging_collector = on : Enable log collector.
• log_directory = 'pg_log' : Specifies the log file storage directory (for example: 'pg_log'). Please modify the path according to actual conditions.
• log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' : Define the log file naming pattern.

In addition, the log_min_duration_statement parameter can record the execution time of SQL statements, which helps performance tuning; log_statement parameter can record all SQL statements.

PostgreSQL log viewing

After restarting the PostgreSQL service, you can use the following command to view the logs in real time:

 tail -f /var/log/postgresql/postgresql-{version number}-main.log

Please replace {版本号} with your PostgreSQL version number.

PostgreSQL log rotation

PostgreSQL usually uses the logrotate tool to manage log rotation. Edit /etc/logrotate.d/postgresql file, configure strategies such as maximum log file size and number of retention. You can also manually rotate logs using pg_rotate_logfile() function.

PostgreSQL log file storage location

In Debian systems, PostgreSQL log files are usually located in /var/log/postgresql/ directory, and the file name is similar to postgresql-{版本号}-main.log or postgresql-{版本号}-instance_name.log .

PostgreSQL log management and monitoring

It is recommended to use professional tools such as pgAdmin to monitor and manage logs. In addition, you can use system timing tasks (such as crontab) to regularly back up log files to ensure data security.

Through the above steps, you can effectively manage PostgreSQL logs on the Debian system to ensure the reliability and maintainability of the database. Please adjust the log configuration parameters according to your specific needs.

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