How To Fix L4100 - Lock table full

SAP Error Message - Details

• Message type: E = Error

• Message class: L4 - LVS inventory

• Message number: 100

• Message text: Lock table full

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message L4100 - Lock table full ?

  The SAP error message L4100: Lock table full typically occurs when the system runs out of available locks in the lock table. This can happen in environments with high concurrency where many users or processes are trying to access the same resources simultaneously, leading to an exhaustion of the lock table entries.
  Causes:
  
  High Concurrency: A large number of users or processes are trying to access the same data simultaneously, leading to a high demand for locks.
  Long-Running Transactions: Transactions that hold locks for an extended period can contribute to the lock table being filled up.
  Insufficient Lock Table Size: The configuration of the lock table may not be adequate for the workload, leading to a situation where the maximum number of locks is reached.
  Deadlocks: Situations where two or more transactions are waiting for each other to release locks can also lead to lock table issues.
  
  Solutions:
  
  
  Increase Lock Table Size:
  
  You can increase the size of the lock table by adjusting the profile parameters in the SAP system. The relevant parameter is enque/table_size. This can be done through transaction RZ10 or RZ11.
  Example: To increase the lock table size, you might set enque/table_size to a higher value (e.g., 20000).
  
  
  
  Optimize Transactions:
  
  Review and optimize long-running transactions to ensure they do not hold locks longer than necessary. This can involve breaking down large transactions into smaller ones or improving the efficiency of the code.
  
  
  
  Monitor Lock Usage:
  
  Use transaction SM12 to monitor and analyze lock entries. This can help identify which users or processes are holding locks and for how long.
  
  
  
  Implement Lock Management Best Practices:
  
  Ensure that your application code is designed to minimize lock contention. This can include using appropriate isolation levels and avoiding unnecessary locks.
  
  
  
  Regular Maintenance:
  
  Regularly check for and resolve any deadlocks or lock contention issues. This can involve analyzing the workload and making adjustments as necessary.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may provide additional guidance or patches related to lock table issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  RZ10 or RZ11: To change profile parameters.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on lock management and performance tuning.
  
  
  Performance Monitoring Tools: Consider using SAP's performance monitoring tools to analyze system performance and identify bottlenecks related to locking.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the L4100 error and improve the overall performance of your SAP system.