How To Fix DB6PM181 - RUNSTATS is recommended due to exceeded update threshold

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 181

• Message text: RUNSTATS is recommended due to exceeded update threshold

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM181 - RUNSTATS is recommended due to exceeded update threshold ?

  The SAP error message DB6PM181 indicates that the database statistics for a particular table or index have not been updated for a certain period, and the system recommends running the RUNSTATS command to refresh these statistics. This is important for the database optimizer to make informed decisions about query execution plans, which can significantly affect performance.
  Cause:
  
  Exceeding Update Threshold: The error occurs when the number of updates (inserts, updates, deletes) to a table exceeds a predefined threshold without the corresponding statistics being updated. This can lead to outdated statistics, which can negatively impact query performance.
  Database Configuration: The threshold for when to run statistics may be set too low or not aligned with the actual usage patterns of the database.
  Lack of Regular Maintenance: If regular maintenance tasks are not scheduled or executed, statistics may not be updated frequently enough.
  
  Solution:
  
  Run the RUNSTATS Command: Execute the RUNSTATS command for the affected table or index. This can usually be done through the database management tools or directly via SQL commands, depending on the database system in use (e.g., DB2, Oracle, etc.).
  
  Example for DB2:
  RUNSTATS ON TABLE schema_name.table_name;
  
  
  
  Schedule Regular Maintenance: Implement a regular maintenance schedule to run statistics updates periodically, especially for tables that experience high transaction volumes.
  Adjust Threshold Settings: Review and adjust the threshold settings for when to run statistics based on the specific usage patterns of your database. This may involve consulting with a database administrator (DBA).
  Monitor Performance: After updating statistics, monitor the performance of queries to ensure that the changes have had a positive effect.
  
  Related Information:
  
  Database Documentation: Refer to the documentation for your specific database system for detailed instructions on running statistics and understanding the implications of outdated statistics.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Performance Tuning: Consider broader performance tuning strategies, including indexing, query optimization, and hardware considerations, to improve overall database performance.
  
  By addressing the underlying cause of the error and implementing a proactive maintenance strategy, you can help ensure that your database performs optimally.