How To Fix DB6521 - The DFT_MON_SORT switch is not set

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 521

• Message text: The DFT_MON_SORT switch is not set

Copy of DB6 519

What causes this issue?

To allow meaningful monitoring of the database, you must activate this
switch.

System Response

If this switch is not set, it can lead to problems ranging from
restricting the function of the CCMS transactions to erroneous
terminations.

How to fix this error?

Activate the switch by setting the appropriate database manager
parameters using the following command:
<LB>UPDATE DBM CFG USING DFT_MON_SORT ON </>
The setting will become active at the next connection to the database.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6521 - The DFT_MON_SORT switch is not set ?

  The SAP error message DB6521, which states "The DFT_MON_SORT switch is not set," typically relates to issues with database monitoring and performance analysis in SAP systems. This error is often encountered when the database monitoring features are not properly configured or when certain settings are not enabled.
  Cause:
  The error occurs because the DFT_MON_SORT switch, which is used for sorting in database monitoring, is not activated. This switch is essential for certain monitoring functionalities to work correctly, particularly when analyzing performance metrics or executing specific database queries.
  Solution:
  To resolve the DB6521 error, you can follow these steps:
  
  
  Check Database Configuration:
  
  Ensure that the database monitoring settings are correctly configured in your SAP system. This may involve checking the database parameters and ensuring that the DFT_MON_SORT switch is enabled.
  
  
  
  Enable the DFT_MON_SORT Switch:
  
  Depending on your database system (e.g., Oracle, SQL Server, HANA), you may need to enable the DFT_MON_SORT switch through the database configuration settings. This often involves executing specific SQL commands or using database management tools.
  
  
  
  Consult Documentation:
  
  Refer to the official SAP documentation or the database vendor's documentation for detailed instructions on enabling the DFT_MON_SORT switch. This documentation will provide the necessary steps tailored to your specific database system.
  
  
  
  Restart Database Services:
  
  After making changes to the configuration, it may be necessary to restart the database services or the SAP application server to ensure that the changes take effect.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system and database are up to date with the latest patches and updates, as this can sometimes resolve configuration issues.
  
  
  
  Contact Support:
  
  If the issue persists after following the above steps, consider reaching out to SAP support or your database vendor's support for further assistance.
  
  
  
  Related Information:
  
  Database Monitoring: Understanding how database monitoring works in SAP can help you troubleshoot similar issues in the future. Familiarize yourself with the monitoring tools available in your SAP system.
  Performance Tuning: The DFT_MON_SORT switch is related to performance tuning. Regularly monitor and tune your database to ensure optimal performance.
  SAP Notes: Check SAP Notes for any specific notes related to the DB6521 error, as they may provide additional insights or solutions.
  
  By following these steps, you should be able to resolve the DB6521 error and ensure that your database monitoring features are functioning correctly.