How To Fix KK019 - System error: Lock table overflow

SAP Error Message - Details

• Message type: E = Error

• Message class: KK -

• Message number: 019

• Message text: System error: Lock table overflow

What causes this issue?

A system error occurred.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Notify your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KK019 - System error: Lock table overflow ?

  The SAP error message KK019: System error: Lock table overflow typically occurs when the system's lock table, which is used to manage locks on database records, becomes full. This can happen in high-concurrency environments where many users or processes are trying to access or modify the same data simultaneously.
  Causes:
  
  High Concurrency: A large number of users or processes are trying to access the same data, leading to an overflow of the lock table.
  Long-Running Transactions: Transactions that hold locks for an extended period can contribute to the lock table becoming full.
  Insufficient Lock Table Size: The configuration of the lock table may not be adequate for the volume of transactions being processed.
  Deadlocks: Situations where two or more transactions are waiting for each other to release locks can exacerbate the issue.
  
  Solutions:
  
  
  Increase Lock Table Size:
  
  You can increase the size of the lock table by adjusting the parameter enque/table_size in the SAP system profile. This requires a restart of the SAP system to take effect.
  Consult with your Basis team to determine the appropriate size based on your system's usage patterns.
  
  
  
  Optimize Transactions:
  
  Review and optimize long-running transactions to ensure they complete quickly and release locks promptly.
  Encourage users to avoid holding locks longer than necessary.
  
  
  
  Monitor Lock Usage:
  
  Use transaction codes like SM12 (Display and Delete Locks) to monitor current locks and identify any that are held for too long.
  Analyze the lock situation to identify patterns or specific transactions that are causing excessive locking.
  
  
  
  Implement Lock Management Best Practices:
  
  Educate users on best practices for data access and modification to minimize lock contention.
  Consider implementing application-level locking mechanisms if applicable.
  
  
  
  Check for Deadlocks:
  
  Use transaction SM21 (System Log) to check for deadlock situations and analyze the logs to identify problematic transactions.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to lock table issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and Delete Locks
  SM21: System Log
  SM37: Job Monitoring
  ST22: Dump Analysis
  
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on lock management and performance tuning.
  
  
  SAP Community: Engage with the SAP Community forums for insights and experiences shared by other users facing similar issues.
  
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.