How To Fix /SDF/DB6116 - Too many deadlocks occur in the system

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/DB6 -

• Message number: 116

• Message text: Too many deadlocks occur in the system

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/DB6116 - Too many deadlocks occur in the system ?

  The SAP error message /SDF/DB6116 Too many deadlocks occur in the system indicates that the system is experiencing a high number of deadlocks, which can lead to performance issues and affect the overall stability of the application. Deadlocks occur when two or more transactions are waiting for each other to release locks, resulting in a situation where none of the transactions can proceed.
  Causes of the Error
  
  High Concurrency: A large number of transactions trying to access the same resources simultaneously can lead to deadlocks.
  Locking Strategy: Inefficient locking strategies in the application code can increase the likelihood of deadlocks.
  Long-Running Transactions: Transactions that take a long time to complete can hold locks for extended periods, increasing the chance of deadlocks.
  Database Design: Poor database design, such as lack of proper indexing or normalization, can contribute to deadlocks.
  Resource Contention: Multiple processes competing for the same resources can lead to deadlocks.
  
  Solutions
  
  Analyze Deadlock Logs: Use transaction codes like SM21 (System Log) and ST22 (Dump Analysis) to analyze deadlock occurrences and identify the transactions involved.
  Optimize Code: Review and optimize the application code to minimize locking. Ensure that locks are held for the shortest time possible.
  Adjust Locking Strategy: Implement a more efficient locking strategy, such as using optimistic locking where feasible.
  Reduce Transaction Duration: Break long-running transactions into smaller, more manageable units to reduce the time locks are held.
  Increase System Resources: If applicable, consider increasing system resources (CPU, memory) to handle higher concurrency.
  Database Tuning: Optimize database performance by tuning queries, adding indexes, and ensuring proper normalization.
  Monitor and Adjust: Continuously monitor the system for deadlocks and adjust configurations as necessary.
  
  Related Information
  
  SAP Notes: Check SAP Notes related to deadlocks and performance issues. SAP frequently releases updates and recommendations for known issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (Display and Delete Locks), SM21 (System Log), and ST22 (Dump Analysis) for troubleshooting.
  Performance Monitoring: Use tools like SAP Solution Manager or transaction ST03N to monitor system performance and identify bottlenecks.
  Database-Specific Tools: If you are using a specific database (e.g., Oracle, SQL Server), utilize database-specific tools to analyze locking and deadlock situations.
  
  By addressing the underlying causes and implementing the suggested solutions, you can reduce the occurrence of deadlocks and improve the overall performance of your SAP system.