How To Fix RSCV521 - ORACLE: Statistics information for table &1 may be obsolete

SAP Error Message - Details

• Message type: E = Error

• Message class: RSCV - Analysis of BW objects (InfoCubes...)

• Message number: 521

• Message text: ORACLE: Statistics information for table &1 may be obsolete

What causes this issue?

Table &v1& was first analyzed on &v2& with a sampling size of &v3&. It
is possible that the statistics information about this table is
obsolete.

How to fix this error?

Please refresh the statistics information for this table. Use a repair
routine, that is assigned to this analysis routine (function <PF>Remove
error </>in transaction <ZH>RSRV</>).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSCV521 - ORACLE: Statistics information for table &1 may be obsolete ?

  The SAP error message RSCV521 indicates that the statistics information for a specific Oracle database table may be outdated or obsolete. This can lead to suboptimal query performance because the database optimizer relies on accurate statistics to determine the most efficient way to execute queries.
  Cause:
  The cause of this error typically stems from one of the following:
  
  Data Changes: Significant changes in the data within the table (inserts, updates, deletes) can render existing statistics outdated.
  Time-Based Thresholds: Some systems have a time-based threshold for when statistics should be updated, and if this threshold is exceeded, the statistics may be considered obsolete.
  Manual Changes: If statistics were manually deleted or not updated after a bulk load or significant data manipulation, this can also trigger the message.
  
  Solution:
  To resolve the RSCV521 error, you should update the statistics for the affected table. Here are the steps to do this:
  
  
  Use Oracle's DBMS_STATS Package:
  You can use the DBMS_STATS package to gather statistics for the specific table. The command can be executed in an Oracle SQL environment. For example:
  EXEC DBMS_STATS.GATHER_TABLE_STATS('schema_name', 'table_name');
  Replace schema_name and table_name with the appropriate values for your database.
  
  
  Schedule Regular Updates:
  To prevent this issue from recurring, consider scheduling regular updates of statistics, especially after large data modifications. This can be done using Oracle's job scheduling features or through SAP's background job scheduling.
  
  
  Check for Automatic Statistics Gathering:
  Ensure that the automatic statistics gathering feature is enabled in your Oracle database. This can help maintain up-to-date statistics without manual intervention.
  
  
  Monitor and Analyze:
  Regularly monitor the performance of your queries and analyze the execution plans to ensure that the statistics are being used effectively.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or updates related to this error message.
  Oracle Documentation: Refer to Oracle's documentation on statistics gathering and the DBMS_STATS package for more detailed information on how to manage statistics effectively.
  Performance Tuning: Consider performance tuning practices in your SAP environment to ensure optimal database performance.
  
  By following these steps, you should be able to resolve the RSCV521 error and maintain optimal performance for your SAP applications that rely on Oracle databases.