How To Fix RS_SMA123 - Invalid number of partitions &1, only &2 active slaves

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_SMA -

• Message number: 123

• Message text: Invalid number of partitions &1, only &2 active slaves

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message RS_SMA123 - Invalid number of partitions &1, only &2 active slaves ?

  The SAP error message RS_SMA123 indicates an issue related to the number of active slaves (or background processes) in a system that is configured for parallel processing, particularly in the context of SAP BW (Business Warehouse) or SAP HANA.
  Cause:
  This error typically occurs when the system is trying to execute a process that requires a certain number of partitions (or parallel processes) to be active, but the actual number of active slave processes is less than what is required. The message format indicates that the system expected a certain number of partitions (denoted by &1) but found only a limited number of active slaves (denoted by &2).
  Possible Causes:
  
  Configuration Issues: The system may not be configured correctly to handle the required number of parallel processes.
  Resource Limitations: There may be insufficient resources (CPU, memory) available to start the required number of slave processes.
  System Load: The system might be under heavy load, causing some processes to be unavailable or delayed.
  Process Termination: Some slave processes may have terminated unexpectedly or failed to start.
  
  Solution:
  To resolve the RS_SMA123 error, consider the following steps:
  
  
  Check Configuration:
  
  Review the configuration settings for parallel processing in your SAP system. Ensure that the number of allowed parallel processes is set correctly.
  Check the settings in transaction RSCONN01 (for BW) or relevant configuration transactions for your specific SAP environment.
  
  
  
  Monitor System Resources:
  
  Use transaction ST02 (Buffer Management) and ST06 (Operating System Monitor) to check for resource bottlenecks.
  Ensure that there are enough CPU and memory resources available for the processes to run.
  
  
  
  Adjust Parallel Processing Settings:
  
  If the number of active slaves is too low, consider increasing the number of background processes in the instance profile (via RZ10 or RZ11).
  You can also adjust the number of parallel processes for specific jobs in the job scheduling settings.
  
  
  
  Check Job Logs:
  
  Review the job logs for any errors or warnings that might indicate why the slave processes are not starting or are failing.
  
  
  
  Restart Processes:
  
  If you suspect that some processes are stuck or have failed, consider restarting the affected jobs or the entire instance if necessary.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes: RSCONN01, ST02, ST06, RZ10, RZ11
  SAP BW Documentation: Review the SAP BW documentation for best practices on configuring parallel processing.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the RS_SMA123 error effectively. If the problem persists, consider reaching out to SAP support for further assistance.