How To Fix S1823 - DB optimizer statistics of & tables (high priority) are obsolete

SAP Error Message - Details

• Message type: E = Error

• Message class: S1 - Statistik / SAP-Monitor

• Message number: 823

• Message text: DB optimizer statistics of & tables (high priority) are obsolete

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message S1823 - DB optimizer statistics of & tables (high priority) are obsolete ?

  The SAP error message S1823 indicates that the database optimizer statistics for certain tables are considered obsolete. This can lead to inefficient query execution plans, which may result in performance issues when accessing the affected tables.
  Cause:
  The cause of this error message is typically related to the following factors:
  
  Data Changes: Significant changes in the data volume or distribution within the tables can render the existing statistics outdated.
  Database Maintenance: Regular database maintenance tasks, such as data archiving or bulk data loads, can also affect the accuracy of the statistics.
  Time-Based Obsolescence: Some systems have a time-based threshold for when statistics are considered obsolete, regardless of data changes.
  
  Solution:
  To resolve the S1823 error message, you need to update the optimizer statistics for the affected tables. Here are the steps to do this:
  
  
  Use Transaction Code ST03N: 
  
  Go to transaction ST03N to analyze the workload and identify the tables that are causing the issue.
  
  
  
  Update Statistics:
  
  You can update the statistics using the following methods:
  
  DBACOCKPIT: Use the DBACOCKPIT transaction to navigate to the database statistics section and update the statistics for the affected tables.
  SQL Command: If you have access to the database, you can run the appropriate SQL command to gather statistics. For example, in Oracle, you might use DBMS_STATS.GATHER_TABLE_STATS.
  SAP Transaction: Use transaction DB02 to check the status of the database and update statistics.
  
  
  
  
  
  Schedule Regular Updates: 
  
  To prevent this issue from recurring, consider scheduling regular updates of the optimizer statistics as part of your database maintenance plan.
  
  
  
  Monitor Performance: 
  
  After updating the statistics, monitor the performance of the affected queries to ensure that the changes have had a positive impact.
  
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or specific instructions related to your version of SAP and database.
  Database Documentation: Refer to the documentation for your specific database (e.g., Oracle, SQL Server, HANA) for best practices on managing and updating statistics.
  Performance Tuning: Consider engaging in broader performance tuning activities if you frequently encounter issues with obsolete statistics.
  
  By following these steps, you should be able to resolve the S1823 error and improve the performance of your SAP system.