How to clear the full DB2 database log?

2 years ago
Benjamin Taylor
2 minutes

To clean up the DB2 database logs, you can follow these steps:

  1. First, connect to the database server and open either the DB2 Control Center or command line window.
  2. Use the following command to check the current log usage:
  3. Connect to the database in DB2.
    Get the log file size, log primary, log secondary, and log buffer size configurations for the database in DB2.
    List the backup history for all backups for the database in DB2.
  4. Based on the output of the above command, determine the size of the log files (LOGFILSIZ), the number of primary log files (LOGPRIMARY), the number of secondary log files (LOGSECOND), and the size of the log buffer (LOGBUFSZ). These parameters will affect the usage and cleaning strategy of the log files.
  5. Check the usage status of the current log file with the following command:
  6. List the active log files for in IBM Db2.
  7. Based on the output of the above command, identify which log files can be cleaned. Typically, archived log files can be cleaned up.
  8. Backup the archived log files using the following command (optional):
  9. Create a backup of the database named at and include transaction logs.
  10. Use the following command to clean up archived log files:
  11. db2 remove historical logs and erase them
  12. represents the number of latest log files to retain. This command will remove the old archived log files.
  13. Use the following command to clean the log files of the current activity:
  14. Archive logs for to in DB2.
  15. The is where the backup log files are stored. This command archives the current active log file to the specified location.
  16. Set up automatic log file cleaning with the following command (optional):
  17. Enable automatic deletion of obsolete recovery objects for the specified database in db2.
  18. This will automatically clean up archived log files.
  19. Finally, use the following command to confirm if the log cleaning operation was successful:
  20. Show the active log files for the specified database in DB2.
  21. If the command output is empty, it means the logs have been successfully cleared.

Please note that clearing log files may make data recovery difficult, so ensure there is an appropriate backup strategy and recovery plan before clearing logs. It is recommended to consult with a DBA or database administrator before clearing logs.

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