How To Fix /SDF/DB6115 - Number of deadlocks per day

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/DB6 -

• Message number: 115

• Message text: Number of deadlocks per day

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/DB6115 - Number of deadlocks per day ?

  The SAP error message /SDF/DB6115 indicates that the system has detected a high number of deadlocks occurring within a day. Deadlocks in a database context occur when two or more transactions are waiting for each other to release locks, leading to a situation where none of the transactions can proceed. This can severely impact system performance and user experience.
  Cause:
  
  High Concurrency: Multiple transactions trying to access the same resources simultaneously can lead to deadlocks.
  Locking Strategy: Inefficient locking strategies or inappropriate isolation levels 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: Poorly designed database schemas or indexes can lead to inefficient access patterns, contributing to deadlocks.
  Application Logic: Application code that does not handle transactions properly can lead to deadlocks.
  
  Solution:
  
  Analyze Deadlock Logs: Use transaction codes like ST22 (Dump Analysis) or SM21 (System Log) to analyze deadlock occurrences and identify the transactions involved.
  Optimize Transactions:
  
  Reduce the duration of transactions to minimize the time locks are held.
  Ensure that transactions acquire locks in a consistent order to avoid circular wait conditions.
  
  
  Adjust Locking Strategy: Review and adjust the locking strategy used in your application. Consider using optimistic locking where appropriate.
  Database Tuning: Optimize database performance by tuning parameters, indexes, and queries to reduce contention.
  Monitor and Alert: Set up monitoring and alerting for deadlocks to proactively manage and address issues before they impact users.
  Review Application Code: Ensure that the application code is designed to handle transactions efficiently and avoid unnecessary locking.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to deadlocks and performance tuning for specific recommendations and patches.
  Database Documentation: Review the documentation for the specific database being used (e.g., HANA, Oracle, SQL Server) for best practices on managing locks and deadlocks.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools (like SAP Solution Manager) to gain insights into system performance and identify bottlenecks.
  
  By addressing the underlying causes of deadlocks and implementing the suggested solutions, you can reduce the occurrence of the /SDF/DB6115 error and improve overall system performance.