How To Fix /SDF/DB6121 - Number of lock timeouts per hour

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/DB6 -

• Message number: 121

• Message text: Number of lock timeouts per hour

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/DB6121 - Number of lock timeouts per hour ?

  The SAP error message /SDF/DB6121 indicates that the number of lock timeouts per hour has exceeded a predefined threshold. This typically occurs in environments where multiple transactions are trying to access the same database records simultaneously, leading to contention and lock timeouts.
  
  Cause:
  
  High Concurrency: Multiple users or processes are trying to access the same data simultaneously, leading to lock contention.
  Long-Running Transactions: Transactions that take a long time to complete can hold locks for extended periods, increasing the likelihood of timeouts for other transactions.
  Inefficient Queries: Poorly optimized queries can lead to longer execution times, which can exacerbate locking issues.
  Database Configuration: The database settings may not be optimized for the workload, leading to increased lock contention.
  Application Logic: Inefficient application logic that leads to unnecessary locking of resources.
  
  
  Solution:
  
  Analyze Lock Contention: Use transaction codes like SM12 (to view locks) and SM21 (to check system logs) to identify which transactions are causing the lock timeouts.
  Optimize Transactions: