How To Fix 03112 - Lock table overflow

SAP Error Message - Details

• Message type: E = Error

• Message class: 03 -

• Message number: 112

• Message text: Lock table overflow

What causes this issue?

This table overflowed whilst the system was entering SAP locks in the
lock table.

System Response

The system cannot issue locks.

How to fix this error?

Contact the system administrator responsible. If this error occurrs
regularly, you should change the size of the profile parameter
'enque/table_size'. This parameter defines the size of the lock table
in KBytes.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 03112 - Lock table overflow ?

  The SAP error message "03112 Lock table overflow" indicates that the lock table in the SAP system has reached its maximum capacity. This typically occurs when there are too many locks being held in the system, which can happen due to various reasons such as long-running transactions, improper handling of locks in custom programs, or a high volume of concurrent users.
  Causes:
  
  High Volume of Concurrent Users: A large number of users trying to access and modify data simultaneously can lead to an overflow of the lock table.
  Long-Running Transactions: Transactions that take a long time to complete can hold locks for extended periods, preventing other transactions from acquiring necessary locks.
  Inefficient Custom Code: Custom ABAP programs that do not properly release locks can contribute to the lock table filling up.
  Configuration Issues: The lock table size may be set too small for the workload of the system.
  
  Solutions:
  
  
  Increase Lock Table Size: You can increase the size of the lock table by adjusting the profile parameters. The parameter enque/table_size can be modified to allow for more locks.
  
  This can be done in the SAP system by using transaction RZ10 to change the instance profile and then restarting the instance.
  
  
  
  Analyze and Optimize Custom Code: Review custom ABAP programs to ensure that locks are being released properly and that transactions are not holding locks longer than necessary.
  
  Use transaction SE30 (Runtime Analysis) or SAT (ABAP Trace) to identify long-running transactions and optimize them.
  
  
  
  Monitor Lock Usage: Use transaction SM12 to monitor the locks currently held in the system. This can help identify which users or processes are holding locks for too long.
  
  
  Implement Lock Management Best Practices: Educate users and developers on best practices for lock management, such as minimizing the duration of locks and avoiding unnecessary locking.
  
  
  Review System Performance: Ensure that the overall system performance is optimal, as performance issues can lead to longer transaction times and increased lock contention.
  
  
  Regular Maintenance: Regularly check for and resolve any issues that may lead to excessive locking, such as database deadlocks or inefficient queries.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM21: Check system logs for any related errors or warnings.
  RZ10: Change instance profile parameters.
  SE30 or SAT: Analyze performance of ABAP programs.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to lock table management.
  
  
  Documentation: Refer to SAP documentation for detailed information on lock management and performance tuning.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the "03112 Lock table overflow" error in your SAP system.