How To Fix DB6PM204 - Database connection '&1' already in use by system &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 204

• Message text: Database connection '&1' already in use by system &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM204 - Database connection '&1' already in use by system &2 ?

  The SAP error message DB6PM204 indicates that a database connection identified by &1 is already in use by another system identified by &2. This typically occurs in environments where multiple SAP systems or instances are trying to access the same database connection simultaneously, which is not allowed.
  Cause:
  
  Concurrent Access: The most common cause is that the database connection is already established by another SAP instance or system, and the current instance is trying to use the same connection.
  Configuration Issues: There may be misconfigurations in the database connection settings in the SAP system.
  Resource Limits: The database may have reached its limit for concurrent connections, preventing new connections from being established.
  
  Solution:
  
  Check Active Connections: Use database management tools to check which connections are currently active and identify the system using the connection.
  Review Configuration: Ensure that the database connection settings in the SAP system (e.g., in the DBACOCKPIT or DB02) are correctly configured and do not point to the same connection for multiple systems.
  Connection Pooling: If applicable, consider implementing connection pooling to manage database connections more efficiently.
  Restart the System: If the connection is stuck or not being released properly, restarting the SAP instance may help.
  Database Configuration: Check the database configuration to ensure it allows the required number of concurrent connections. You may need to increase the limit if necessary.
  Consult Documentation: Refer to the SAP documentation or notes related to your specific database and SAP version for any additional troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Database Logs: Review the database logs for any additional error messages or warnings that could provide more context.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  System Monitoring: Use tools like SAP Solution Manager or other monitoring tools to keep track of system performance and connection usage.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your database administrator or SAP support for further assistance.