How To Fix /SDF/DB6134 - Maximum table change rate since the last statistics update

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/DB6 -

• Message number: 134

• Message text: Maximum table change rate since the last statistics update

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/DB6134 - Maximum table change rate since the last statistics update ?

  The SAP error message /SDF/DB6134 Maximum table change rate since the last statistics update typically indicates that the change rate of a database table has exceeded a predefined threshold since the last time statistics were updated for that table. This can lead to performance issues because the database optimizer relies on accurate statistics to make informed decisions about how to execute queries efficiently.
  Cause:
  
  High Volume of Data Changes: The table in question may be experiencing a high volume of inserts, updates, or deletes, which can lead to a significant change in the data distribution.
  Outdated Statistics: If the statistics for the table have not been updated recently, the database optimizer may not have the most accurate information about the data, leading to suboptimal query performance.
  Threshold Settings: The threshold for the maximum change rate may be set too low for the specific use case, causing the error to trigger even with normal operations.
  
  Solution:
  
  
  Update Statistics: The most straightforward solution is to update the statistics for the affected table. This can typically be done using the following SQL command:
  CALL DBMS_STATS.GATHER_TABLE_STATS('schema_name', 'table_name');
  Replace schema_name and table_name with the appropriate values for your environment.
  
  
  Monitor Change Rates: Monitor the change rates of the tables to understand their behavior over time. This can help in adjusting the threshold settings if necessary.
  
  
  Adjust Thresholds: If the high change rate is expected and normal for your application, consider adjusting the threshold settings for the maximum change rate. This can usually be done in the database configuration settings.
  
  
  Regular Maintenance: Implement a regular maintenance schedule to update statistics periodically, especially for tables that are known to have high change rates.
  
  
  Analyze Query Performance: After updating statistics, analyze the performance of queries that access the affected table to ensure that they are executing efficiently.
  
  
  Related Information:
  
  Database Statistics: Statistics are essential for the query optimizer to make informed decisions about execution plans. They include information about the number of rows, data distribution, and more.
  Performance Tuning: Regularly updating statistics is a key part of database performance tuning. It helps ensure that the optimizer has the most accurate information to work with.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message, as there may be updates or best practices provided by SAP.
  
  If the problem persists after taking these steps, it may be beneficial to consult with your database administrator or SAP support for further assistance.