How To Fix DB6516 - The DFT_MON_LOCK switch is set

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 516

• Message text: The DFT_MON_LOCK switch is set

INCLUDE BC_DB6_OK OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6516 - The DFT_MON_LOCK switch is set ?

  The SAP error message DB6516 indicates that the DFT_MON_LOCK switch is set, which is related to database monitoring and locking mechanisms in SAP systems. This error typically arises in the context of database operations, particularly when there are issues with database locks or monitoring settings.
  Cause:
  The DFT_MON_LOCK switch is a configuration setting that, when enabled, can prevent certain database operations from proceeding if there are locks in place. This is often a safety mechanism to ensure data integrity and consistency. The error message suggests that the system is currently in a state where it cannot proceed with a database operation due to this lock.
  Solution:
  To resolve the DB6516 error, you can take the following steps:
  
  
  Check for Active Locks: Use transaction codes like SM12 to check for any active locks in the system. If there are locks that are no longer needed, you can release them.
  
  
  Review DFT_MON_LOCK Setting: If the DFT_MON_LOCK switch is set and causing issues, you may need to review its necessity. This can typically be done in the database configuration settings. Consult your database administrator or SAP Basis team to determine if it can be safely disabled.
  
  
  Database Monitoring: Ensure that your database monitoring tools are functioning correctly. Sometimes, issues with monitoring can lead to unnecessary locks being held.
  
  
  Restart Database Services: In some cases, restarting the database services can help clear any stale locks or processes that are causing the issue.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that can resolve the issue.
  
  
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and the context of the error.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (for lock entries), SM21 (for system logs), and ST22 (for dumps) to diagnose issues further.
  Database Documentation: Review the documentation for your specific database (e.g., HANA, Oracle, SQL Server) as the handling of locks and monitoring can vary between systems.
  System Performance: Monitor system performance and database health regularly to prevent issues related to locking and performance bottlenecks.
  
  By following these steps, you should be able to address the DB6516 error and restore normal operation to your SAP system.