How To Fix RSCV593 - DB2/UDB: Clustering of table &1 is not correct

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 593

• Message text: DB2/UDB: Clustering of table &1 is not correct

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

What causes this issue?

An error occurred during activation of the table &V1& .

System Response

In general, clustering improves the performance of read access to a
table. Two types of clustering are supported: you can select index
clusters in InfoCube maintenance under <ZK>Extras </>-> <ZK>DB
Performance</> -> <ZK>Clustering .</>
The current clustering of the database table is not correct or there is
no clustering of the database table. For example a clustering index is
missing or the number/selection of MDC columns is not correct.

How to fix this error?

Activate the InfoCube again and check whether errors occurred during
activation.
If the InfoCube already contains data and you want to change the
clustering, you have to use reclustering. You can find this function in
InfoCube maintenance under <LS>More Functions -> Reclustering</> or in
the Data Warehousing Workbench in the function area <LS>Administration
-> Reclustering</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSCV593 - DB2/UDB: Clustering of table &1 is not correct ?

  The SAP error message RSCV593 indicates that there is an issue with the clustering of a table in a DB2/UDB database. This error typically arises when the physical storage of the table's data does not match the expected clustering order, which can lead to performance issues and inefficient data retrieval.
  Cause:
  The primary causes of this error can include:
  
  Data Insertion/Deletion: Frequent insertions and deletions can lead to fragmentation, causing the data to be stored in a non-clustered manner.
  Improper Indexing: If the table is not indexed correctly, it can lead to inefficient data access patterns.
  Database Maintenance: Lack of regular maintenance tasks such as reorganization or re-indexing can contribute to clustering issues.
  Changes in Data Volume: Significant changes in the volume of data can affect how data is clustered.
  
  Solution:
  To resolve the RSCV593 error, you can take the following steps:
  
  
  Reorganize the Table:
  
  Use the DB2 command to reorganize the table. This can help to restore the clustering of the data.
  Example command: 
  REORG TABLE <table_name>
  
  
  
  
  Rebuild Indexes:
  
  Rebuilding the indexes associated with the table can also help improve clustering.
  Example command:
  REBUILD INDEX <index_name>
  
  
  
  
  Run Database Maintenance:
  
  Schedule regular maintenance tasks to reorganize tables and rebuild indexes as needed.
  This can be done using SAP's database administration tools or directly through DB2 commands.
  
  
  
  Analyze Table Statistics:
  
  Use the RUNSTATS command to update the statistics for the table, which can help the optimizer make better decisions.
  Example command:
  RUNSTATS ON TABLE <table_name>
  
  
  
  
  Check for Locks or Long-Running Transactions:
  
  Ensure that there are no locks or long-running transactions that might be preventing the reorganization of the table.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any specific notes related to this error message, as there may be additional recommendations or patches available.
  
  
  
  Related Information:
  
  DB2 Documentation: Refer to the official DB2 documentation for more details on table reorganization and index management.
  SAP Notes: Search for relevant SAP Notes that may provide additional context or solutions specific to your SAP version and configuration.
  Performance Monitoring: Regularly monitor database performance and fragmentation levels to proactively address clustering issues before they lead to errors.
  
  By following these steps, you should be able to resolve the RSCV593 error and improve the performance of your SAP application running on DB2/UDB.