How To Fix DB6138 - Maximum number of overflow page accesses since last REORG

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 138

• Message text: Maximum number of overflow page accesses since last REORG

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6138 - Maximum number of overflow page accesses since last REORG ?

  The SAP error message DB6138 indicates that the maximum number of overflow page accesses has been exceeded since the last reorganization (REORG) of the database table. This typically occurs in the context of database performance and storage management, particularly when dealing with large tables that have a significant number of overflow pages due to fragmentation.
  Cause:
  
  Fragmentation: Over time, as records are inserted, updated, or deleted, the database table can become fragmented. This fragmentation leads to the creation of overflow pages, which are additional pages used to store data when the main data pages are full.
  High Volume of Data: If a table has a high volume of data and frequent modifications, it can lead to an increased number of overflow pages.
  Lack of Regular Maintenance: If regular database maintenance tasks, such as reorganizing tables, are not performed, the number of overflow pages can grow, leading to performance issues.
  
  Solution:
  
  
  Perform a REORG: The immediate solution is to perform a reorganization (REORG) of the affected table. This process will compact the data, remove fragmentation, and reduce the number of overflow pages.
  
  In SAP, you can use transaction codes like DB02 or DB14 to monitor and manage database performance and maintenance tasks.
  You can also use the database-specific tools or commands to perform a REORG, depending on the underlying database (e.g., Oracle, SQL Server, HANA).
  
  
  
  Regular Maintenance: Implement a regular maintenance schedule for your database to perform REORGs and other optimization tasks. This can help prevent the issue from recurring.
  
  
  Monitor Database Performance: Use monitoring tools to keep an eye on database performance metrics, including the number of overflow pages, fragmentation levels, and overall table sizes.
  
  
  Optimize Table Design: Review the design of the table and consider optimizing it. This may include:
  
  Reducing the size of variable-length fields.
  Normalizing the database schema if applicable.
  Archiving old data that is no longer needed.
  
  
  
  Increase Overflow Page Limit: If necessary, you can consider increasing the maximum number of allowed overflow page accesses, but this should be a last resort and done with caution, as it may only mask the underlying issue rather than resolve it.
  
  
  Related Information:
  
  Database Documentation: Refer to the documentation for your specific database system for detailed instructions on performing REORGs and managing overflow pages.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Performance Tuning: Consider engaging in performance tuning practices for your SAP system and database to enhance overall efficiency.
  
  By addressing the underlying causes and implementing regular maintenance, you can mitigate the occurrence of the DB6138 error and improve the performance of your SAP system.