How To Fix /SDF/DB6119 - Number of exclusive lock escalations per hour

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/DB6 -

• Message number: 119

• Message text: Number of exclusive lock escalations per hour

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/DB6119 - Number of exclusive lock escalations per hour ?

  The SAP error message /SDF/DB6119 indicates that the number of exclusive lock escalations per hour has exceeded a predefined threshold. This typically occurs in environments where there are high levels of concurrent database access, leading to contention for database locks.
  Cause:
  
  High Concurrency: A large number of transactions are trying to access the same data simultaneously, leading to lock escalations.
  Lock Contention: When many transactions are waiting for locks, the database may escalate row-level locks to page or table-level locks to reduce the overhead of managing many locks.
  Configuration Issues: The database configuration may not be optimized for the workload, leading to excessive lock escalations.
  Long-Running Transactions: Transactions that hold locks for extended periods can contribute to lock contention and escalations.
  
  Solution:
  
  Analyze Locking Behavior: Use transaction codes like SM12 (to view locks) and SM21 (to check system logs) to analyze which transactions are causing lock contention.
  Optimize Transactions: Review and optimize long-running transactions to ensure they complete quickly and release locks promptly.
  Increase Lock Resources: Depending on the database, you may need to adjust configuration parameters to allow for more locks or to change the lock escalation thresholds.
  Database Tuning: Work with your database administrator to tune the database settings for better performance under high concurrency.
  Review Application Logic: Ensure that the application logic is designed to minimize lock contention, such as by accessing data in a consistent order or using appropriate isolation levels.
  Monitor and Adjust: Continuously monitor the system for lock escalations and adjust configurations as necessary.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to lock management and performance tuning for your specific database (e.g., Oracle, HANA, SQL Server).
  Database Documentation: Refer to the documentation for your specific database system for best practices on managing locks and tuning performance.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools (like ST03N) to analyze workload and identify bottlenecks.
  
  By addressing the underlying causes of lock escalations and optimizing both the application and database configurations, you can reduce the occurrence of the /SDF/DB6119 error and improve overall system performance.