How To Fix DB6126 - Time passed since last table statistics update

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 126

• Message text: Time passed since last table statistics update

What causes this issue?

Among other things, statistical information about tables (size,
distribution of values, and so on) is stored in the database system
tables (system catalog). The optimizer then analyzes this informaiton
when creating access plans for SQL statements.
For tables with variable datasets (transaction data), this statistical
information must be regularly adjusted.

System Response

The better these statistics, the better the optimizer can create plans.
Conversely, obsolete data or statistics that are missing completely can
cause poor access plans and therefore poor performance.

How to fix this error?

Maintain the table statistics with the help of the predefined actions
in the DB13 planning calendar. You can find more information about this
topic in the online documentation for the planning calendar. In the
special case of a BW system, there is a special report:
SAP_ANALYZE_ALL_INFOCUBES. This produces distributed statistics.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6126 - Time passed since last table statistics update ?

  The SAP error message DB6126 indicates that the time since the last update of table statistics has exceeded a certain threshold. This message is typically related to database performance and optimization, as table statistics are crucial for the database optimizer to make informed decisions about query execution plans.
  Cause:
  
  Outdated Statistics: The primary cause of this error is that the statistics for one or more database tables have not been updated for a significant period. This can lead to suboptimal query performance because the database optimizer relies on these statistics to determine the most efficient way to execute queries.
  Database Configuration: Some database systems have settings that trigger warnings or errors when statistics are not updated within a specified timeframe.
  Lack of Maintenance: Regular maintenance tasks, such as updating statistics, may not have been performed due to oversight or scheduling issues.
  
  Solution:
  
  
  Update Table Statistics: The most direct solution is to update the statistics for the affected tables. This can typically be done using database-specific commands or tools. For example:
  
  In Oracle, you might use DBMS_STATS.GATHER_TABLE_STATS.
  In SQL Server, you can use UPDATE STATISTICS or sp_updatestats.
  In SAP HANA, you can use UPDATE STATISTICS command.
  
  
  
  Schedule Regular Maintenance: Implement a regular maintenance schedule to ensure that table statistics are updated periodically. This can be done through automated jobs or scripts that run at off-peak hours.
  
  
  Monitor Database Performance: Keep an eye on database performance metrics to identify when statistics need to be updated. Tools and monitoring solutions can help automate this process.
  
  
  Review Database Configuration: Check the database configuration settings related to statistics updates. Ensure that they are set appropriately to avoid long intervals between updates.
  
  
  Related Information:
  
  Impact on Performance: Outdated statistics can lead to inefficient query plans, resulting in slower performance for database operations.
  Database-Specific Tools: Most database management systems provide tools or commands to analyze and update statistics. Familiarize yourself with these tools for your specific database.
  SAP Notes: Check SAP Notes and documentation for any specific recommendations or patches related to this error message.
  Consult Database Administrator: If you are unsure about how to proceed, consult with a database administrator who can provide guidance based on your specific environment and database system.
  
  By addressing the underlying issue of outdated statistics, you can resolve the DB6126 error and improve the overall performance of your SAP system.