How To Fix D-065 - Lock table overflow

SAP Error Message - Details

• Message type: E = Error

• Message class: D- -

• Message number: 065

• Message text: Lock table overflow

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 D-065 - Lock table overflow ?

  The SAP error message D-065, which indicates "Lock table overflow," typically occurs when the system runs out of space in the lock table. This can happen when there are too many locks being held in the system, often due to long-running transactions or a high volume of concurrent users.
  Causes:
  
  High Volume of Locks: A large number of transactions or users trying to access the same data can lead to an overflow of the lock table.
  Long-Running Transactions: Transactions that hold locks for an extended period can contribute to the lock table filling up.
  Inefficient Lock Management: Poorly designed programs or processes that do not release locks promptly can exacerbate the issue.
  Configuration Limits: The default size of the lock table may be insufficient for the current workload.
  
  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: You might set enque/table_size to a higher value based on your system's requirements.
  
  
  
  Optimize Transactions:
  
  Review and optimize long-running transactions to ensure they complete more quickly and release locks sooner.
  Identify and modify any custom programs that may be holding locks unnecessarily.
  
  
  
  Monitor Lock Usage:
  
  Use transaction SM12 to monitor and analyze lock entries. This can help identify which users or processes are holding locks for too long.
  Regularly check for and clear unnecessary locks.
  
  
  
  Implement Lock Management Best Practices:
  
  Ensure that your applications are designed to minimize lock contention.
  Use appropriate isolation levels and locking strategies to reduce the number of locks held at any one time.
  
  
  
  System Performance Tuning:
  
  Consider overall system performance tuning, including database optimizations, to reduce the load on the lock table.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  RZ10 or RZ11: To change system profile parameters.
  SM21: To check system logs for related errors or warnings.
  
  
  
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to lock table issues. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Review SAP documentation on lock management and performance tuning for more detailed guidance.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the D-065 lock table overflow error in your SAP system.