How To Fix MQ350 - Maximum number of clusters (9998) exceeded

SAP Error Message - Details

• Message type: E = Error

• Message class: MQ - Messages for Euro Changeover Package

• Message number: 350

• Message text: Maximum number of clusters (9998) exceeded

What causes this issue?

In cluster table EWUCLU you need more than 9998 blocks at 5 MB
(standard size) to save your table. This means it is not possible to
store the entire table. The number of blocks is restricted to 9999, and
the last cluster block is reserved as an error cluster.

System Response

The program terminates in the selection phase as soon as this limit is
exceeded.

How to fix this error?

You need to increase the size of the cluster block for this table. The
cluster block size has been set at 5 MB in the standard system. By
making an entry in exception table EWUCLCT you can change this and
other parameters. Following this is it possible to restart the
conversion using the IMG.
For more detailed information consult Note 168728.

Procedure for System Administrators

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 MQ350 - Maximum number of clusters (9998) exceeded ?

  The SAP error message MQ350 indicates that the maximum number of clusters (9998) has been exceeded in the SAP system. This error typically occurs in the context of SAP's database management, particularly when dealing with the clustering of database objects or when managing large volumes of data.
  Cause:
  
  Cluster Limit Exceeded: The primary cause of this error is that the system has reached the maximum limit of clusters that can be created. In SAP, a cluster is a logical grouping of database tables that are stored together for performance reasons.
  Data Model Design: Poor data model design or an excessive number of cluster tables can lead to this issue. If the application is designed to create many clusters without proper management, it can quickly hit the limit.
  Database Configuration: The database configuration may not be optimized for the volume of data being processed, leading to an excessive number of clusters being created.
  
  Solution:
  
  Review Data Model: Analyze the data model to identify unnecessary or redundant cluster tables. Consider normalizing the data model to reduce the number of clusters.
  Database Cleanup: If there are obsolete or unused clusters, consider archiving or deleting them to free up space.
  Increase Cluster Limit: If feasible, consult with your database administrator or SAP support to explore options for increasing the cluster limit, although this may not always be possible depending on the database system in use.
  Optimize Data Storage: Consider using alternative data storage methods, such as transparent tables or pooled tables, if applicable, to reduce the reliance on cluster tables.
  SAP Notes and Support: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error. You can search the SAP Support Portal for specific notes related to MQ350.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for guidelines on database management and best practices for data modeling.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  Performance Monitoring: Implement monitoring tools to keep track of database performance and cluster usage to prevent hitting the limit in the future.
  
  If the issue persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.