How To Fix DB6PM828 - Deadlock Monitor on system &1 has been reset

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 828

• Message text: Deadlock Monitor on system &1 has been reset

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM828 - Deadlock Monitor on system &1 has been reset ?

  The SAP error message DB6PM828 indicates that the Deadlock Monitor for a specific database system (denoted by &1) has been reset. This typically occurs when the database system encounters a deadlock situation, which is a condition where two or more transactions are unable to proceed because each is waiting for the other to release resources.
  Cause:
  
  Deadlock Situation: The primary cause of this error is a deadlock in the database, where two or more transactions are waiting for each other to release locks on resources.
  High Concurrency: A high level of concurrent transactions can increase the likelihood of deadlocks.
  Locking Strategy: Inefficient locking strategies or poorly designed database transactions can lead to deadlocks.
  Long-Running Transactions: Transactions that take a long time to complete can hold locks for extended periods, increasing the chance of deadlocks.
  
  Solution:
  
  Analyze Deadlock Logs: Check the database logs to identify the transactions involved in the deadlock. This can help you understand the locking behavior and the resources involved.
  Optimize Transactions: Review and optimize the transactions that are causing deadlocks. This may involve:
  
  Reducing the duration of transactions.
  Ensuring that transactions acquire locks in a consistent order.
  Breaking large transactions into smaller ones.
  
  
  Adjust Locking Strategy: If applicable, consider adjusting the locking strategy to use less restrictive locks or to implement optimistic concurrency control.
  Database Configuration: Review the database configuration settings related to locking and deadlock detection. Some databases allow you to configure thresholds for deadlock detection.
  Monitor System Performance: Use monitoring tools to keep an eye on system performance and transaction behavior to proactively identify potential deadlocks.
  Database Updates: Ensure that your database system is up to date with the latest patches and updates, as these may contain fixes for known deadlock issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to deadlocks and the specific database you are using (e.g., Oracle, SQL Server, HANA) for additional guidance and best practices.
  Database Documentation: Refer to the documentation of your specific database system for details on deadlock detection and resolution.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  
  By addressing the underlying causes of deadlocks and optimizing your database transactions, you can reduce the occurrence of the DB6PM828 error and improve overall system performance.