How To Fix TB103 - Table processing not possible (SAP lock table full)

SAP Error Message - Details

• Message type: E = Error

• Message class: TB - SM31 table maintenance messages

• Message number: 103

• Message text: Table processing not possible (SAP lock table full)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message TB103 - Table processing not possible (SAP lock table full) ?

  The SAP error message TB103, which states "Table processing not possible (SAP lock table full)," indicates that the lock table in the SAP system has reached its maximum capacity. This can occur when there are too many locks being held in the system, preventing new locks from being created. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  High Lock Usage: The system is experiencing a high number of concurrent transactions that require locks, leading to the exhaustion of available lock entries.
  Long-Running Transactions: Transactions that hold locks for an extended period can contribute to filling up the lock table.
  Configuration Limits: The lock table size may be configured too small for the current workload.
  Unreleased Locks: Locks that are not released due to errors or improper transaction handling can accumulate and fill the lock table.
  
  Solutions:
  
  
  Increase Lock Table Size:
  
  You can increase the size of the lock table by adjusting the parameter enque/table_size in the SAP profile. This requires a system restart to take effect.
  To do this, go to transaction RZ10, select the appropriate profile, and modify the parameter.
  
  
  
  Monitor and Optimize Transactions:
  
  Use transaction SM12 to monitor and analyze the locks currently held in the system. Identify long-running transactions and investigate why they are holding locks for too long.
  Encourage users to complete their transactions promptly to release locks.
  
  
  
  Check for Deadlocks:
  
  Investigate if there are any deadlocks or lock contention issues that may be causing locks to be held longer than necessary.
  
  
  
  Regular Maintenance:
  
  Implement regular monitoring and maintenance procedures to ensure that locks are being released appropriately and that the system is not overloaded with transactions.
  
  
  
  Review Custom Code:
  
  If there are custom programs or enhancements that may be causing excessive locking, review and optimize them to minimize lock usage.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related errors or warnings.
  ST22: To analyze dumps that may provide insights into issues causing locks.
  
  
  
  SAP Notes: Check SAP Notes related to lock table issues for specific guidance and recommendations. You can search for relevant notes in the SAP Support Portal.
  
  
  Performance Monitoring: Use transaction ST03N to analyze workload and performance, which can help identify areas where lock contention is high.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the TB103 error and improve the overall performance of your SAP system.