How To Fix RSD_TREX518 - Compare size of InfoCube fact table with fact index

SAP Error Message - Details

• Message type: E = Error

• Message class: RSD_TREX - Messages from TREX Aggregate Area

• Message number: 518

• Message text: Compare size of InfoCube fact table with fact index

Description
The test calculates the number of records in both fact tables (E and F
tables) for the InfoCube and compares them with the number of records in
the fact index of the BWA index.
If the number of records in the BWA index is significantly greater (>
10%) than the number of those in the InfoCube, you can improve query
performance by rebuilding the BWA index.
A difference in the number of records can be caused by the following:
The InfoCube was compressed after the BWA index was built. Since the BWA
index is not compressed, it can potentially contain more records than
the InfoCube.
Requests were deleted from the InfoCube after the BWA index was built.
The requests are deleted from the BWA index in the package dimension
only. The records in the fact index are therefore no longer referenced
and no longer taken into account when the query is executed; they are
not, however, deleted.
<ZH>Note that the database statistics</> for calculating the size of the
fact table <ZH>must be up to date</>, since the test does not recount
it uses the database statistics from the tables.
Repair
It is not mandatory to rebuild the indexes, but this could be advisable
if the difference is significant.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSD_TREX518 - Compare size of InfoCube fact table with fact index ?

  The SAP error message RSD_TREX518 indicates a discrepancy between the size of the InfoCube fact table and the size of the corresponding fact index in the SAP BW (Business Warehouse) system. This error typically arises during the process of data loading or when performing queries against the InfoCube.
  Cause:
  
  Data Inconsistency: The most common cause of this error is that the data in the InfoCube fact table and the fact index are not synchronized. This can happen due to incomplete data loads, failed processes, or manual interventions that affect the data integrity.
  Index Corruption: The fact index may become corrupted or out of sync with the underlying fact table due to system errors or issues during data processing.
  Data Deletion: If records are deleted from the InfoCube fact table without corresponding updates to the index, this can lead to size mismatches.
  System Upgrades or Changes: Changes in the system configuration or upgrades can sometimes lead to inconsistencies in data structures.
  
  Solution:
  To resolve the RSD_TREX518 error, you can follow these steps:
  
  
  Rebuild the Index:
  
  Use transaction code RSD1 to access the InfoCube.
  Navigate to the "Manage" option and select "Rebuild Index" or "Reorganize Index" to rebuild the fact index. This process will synchronize the index with the fact table.
  
  
  
  Check Data Load Processes:
  
  Review the data load processes to ensure that they completed successfully. Check for any errors or warnings in the data load logs.
  If there are issues, re-run the data load process to ensure that all data is correctly loaded into the InfoCube.
  
  
  
  Data Consistency Check:
  
  Use transaction code RSA1 to access the Data Warehousing Workbench.
  Perform a consistency check on the InfoCube to identify any discrepancies between the fact table and the index.
  
  
  
  Delete and Reload Data:
  
  If the issue persists, consider deleting the data from the InfoCube and reloading it from the source system. This can help ensure that both the fact table and the index are in sync.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that can help resolve the issue.
  
  
  
  System Monitoring:
  
  Monitor the system for any recurring issues that may lead to this error. Implementing regular maintenance and monitoring can help prevent future occurrences.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSD1 (InfoCube management), RSA1 (Data Warehousing Workbench), and RSCUSTV10 (to check settings).
  SAP Documentation: Refer to SAP Help documentation for detailed information on InfoCubes, data loading processes, and index management.
  Performance Considerations: Regularly monitor the performance of your InfoCubes and indexes to ensure optimal performance and avoid potential issues.
  
  By following these steps, you should be able to resolve the RSD_TREX518 error and ensure that your InfoCube data is consistent and reliable.