How To Fix DB02121 - row_cache_cursors. Recursively buffered cursors used by row cache manager

SAP Error Message - Details

• Message type: E = Error

• Message class: DB02 - For Oracle Component of the Database Monitor

• Message number: 121

• Message text: row_cache_cursors. Recursively buffered cursors used by row cache manager

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB02121 - row_cache_cursors. Recursively buffered cursors used by row cache manager ?

  The SAP error message DB02121, which refers to "row_cache_cursors" and indicates that recursively buffered cursors are being used by the row cache manager, typically arises in the context of database performance and resource management. This error can occur in environments where SAP applications interact with databases, particularly when there are issues related to cursor management and memory allocation.
  Cause:
  
  Excessive Cursor Usage: The error often indicates that there are too many cursors being opened and not properly closed, leading to resource exhaustion.
  Recursive Queries: If your application is executing recursive queries that require multiple cursors, it can lead to this error.
  Memory Limitations: The database may be hitting memory limits due to the number of active cursors or the size of the data being processed.
  Configuration Issues: There may be misconfigurations in the database settings related to cursor management or memory allocation.
  
  Solution:
  
  
  Review Cursor Management:
  
  Ensure that all cursors are properly closed after their use. This can be done by reviewing the application code and ensuring that cursors are not left open unnecessarily.
  Implement proper error handling to ensure that cursors are closed even in the event of an error.
  
  
  
  Optimize Queries:
  
  Analyze the SQL queries being executed to identify any that can be optimized to reduce the number of cursors required.
  Consider using simpler queries or breaking complex queries into smaller, more manageable parts.
  
  
  
  Database Configuration:
  
  Check the database configuration settings related to cursor management and memory allocation. Adjust these settings if necessary to allow for more cursors or to optimize memory usage.
  Consult the database documentation for recommended settings based on your workload.
  
  
  
  Monitor Resource Usage:
  
  Use monitoring tools to track the number of open cursors and memory usage in the database. This can help identify patterns or specific queries that are causing the issue.
  Set up alerts for when resource usage approaches critical levels.
  
  
  
  Database Maintenance:
  
  Regularly perform database maintenance tasks such as updating statistics, rebuilding indexes, and cleaning up unused objects to improve overall performance.
  
  
  
  Consult Documentation and Support:
  
  Refer to SAP and database vendor documentation for specific guidance on handling cursor-related issues.
  If the problem persists, consider reaching out to SAP support or your database vendor for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Database Logs: Review database logs for any additional error messages or warnings that may provide more context about the issue.
  Performance Tuning: Consider engaging in performance tuning exercises for both the SAP application and the underlying database to improve overall efficiency.
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the DB02121 error and improve the performance of your SAP application.