How To Fix SDBALM194 - Optimizer statistics are too old (&1 days > &2 days)

SAP Error Message - Details

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 194

• Message text: Optimizer statistics are too old (&1 days > &2 days)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM194 - Optimizer statistics are too old (&1 days > &2 days) ?

  The SAP error message SDBALM194 indicates that the optimizer statistics for a database table are considered too old. This can lead to suboptimal query performance because the database optimizer relies on these statistics to determine the most efficient way to execute queries.
  Cause:
  The error occurs when the optimizer statistics for a table have not been updated for a period longer than the threshold defined in the system settings. The message specifies that the statistics are older than a certain number of days (e.g., &1 days > &2 days), where &1 is the age of the statistics and &2 is the maximum allowed age.
  Solution:
  To resolve this issue, you need to update the optimizer statistics for the affected database tables. Here are the steps to do this:
  
  
  Identify the Affected Tables: Check the error message for the specific table(s) that are causing the issue.
  
  
  Update Statistics:
  
  If you are using SAP HANA, you can use the following SQL command to update the statistics:
  ANALYZE TABLE <schema>.<table_name>;
  
  For other databases (like Oracle, SQL Server, etc.), you may need to use the respective commands to gather statistics. For example, in Oracle, you might use:
  EXEC DBMS_STATS.GATHER_TABLE_STATS('<schema>', '<table_name>');
  
  
  
  
  Schedule Regular Updates: To prevent this issue from recurring, consider scheduling regular updates of optimizer statistics. This can often be done through database maintenance jobs or by configuring the database to automatically gather statistics at specified intervals.
  
  
  Check System Settings: Review the system settings related to optimizer statistics to ensure that the thresholds for "too old" statistics are appropriate for your environment. You may want to adjust the settings if necessary.
  
  
  Monitor Performance: After updating the statistics, monitor the performance of queries that were previously affected to ensure that the changes have had a positive impact.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to optimizer statistics for your specific database type. SAP frequently publishes notes that provide guidance on performance tuning and maintenance.
  Database Documentation: Refer to the documentation for your specific database system for best practices on managing and updating optimizer statistics.
  Transaction Codes: In SAP, you can use transaction codes like DB02 (Database Performance Monitor) to monitor database performance and check for issues related to statistics.
  
  By keeping your optimizer statistics up to date, you can help ensure that your database queries run efficiently and effectively.