How To Fix RS_DB_DB6523 - Too many MDC indexes defined for table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_DB_DB6 - DB6-Specific Messages in SAP BW

• Message number: 523

• Message text: Too many MDC indexes defined for table &1

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Report an incident on component BW-SYS-DB-DB6.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RS_DB_DB6523 - Too many MDC indexes defined for table &1 ?

  The SAP error message RS_DB_DB6523 indicates that there are too many Multi-Dimensional Cube (MDC) indexes defined for a specific table in the SAP BW (Business Warehouse) system. This error typically arises when the number of MDC indexes exceeds the limit set by the database or the SAP BW system configuration.
  Cause:
  
  Exceeding Index Limit: Each database has a limit on the number of indexes that can be created for a single table. When this limit is exceeded, the system generates the RS_DB_DB6523 error.
  Design Issues: Poor design of the data model or unnecessary creation of indexes can lead to this situation. This often happens when multiple InfoCubes or DataStore Objects (DSOs) are created without proper consideration of the underlying database constraints.
  Database Configuration: Different databases (e.g., Oracle, SQL Server, HANA) have different limits on the number of indexes, and the configuration of the database may also affect this.
  
  Solution:
  
  
  Review and Optimize Indexes:
  
  Analyze the existing MDC indexes for the table in question. Determine which indexes are necessary and which can be removed.
  Use transaction codes like RSA1 (Data Warehousing Workbench) to check the InfoCubes and their associated indexes.
  Consider consolidating or redesigning the data model to reduce the number of indexes.
  
  
  
  Delete Unused Indexes:
  
  If there are indexes that are no longer needed or are redundant, you can delete them. This can be done through the Data Warehousing Workbench or directly in the database, depending on your access and permissions.
  
  
  
  Database-Specific Solutions:
  
  If you are using a specific database, consult the documentation for that database to understand its limitations and best practices for managing indexes.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  
  
  
  Engage with SAP Support:
  
  If the issue persists or if you are unsure about the changes to make, consider reaching out to SAP Support for assistance.
  
  
  
  Related Information:
  
  Database Documentation: Review the documentation for your specific database to understand its limitations regarding indexes.
  SAP BW Best Practices: Familiarize yourself with best practices for designing InfoCubes and DSOs in SAP BW to avoid similar issues in the future.
  Performance Considerations: Keep in mind that having too many indexes can also negatively impact performance, as it can slow down data loading and querying processes.
  
  By following these steps, you should be able to resolve the RS_DB_DB6523 error and optimize your SAP BW environment.