How To Fix SAI_CACHE109 - Partial cache refresh started in background

SAP Error Message - Details

• Message type: E = Error

• Message class: SAI_CACHE - XI Configuration Cache

• Message number: 109

• Message text: Partial cache refresh started in background

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAI_CACHE109 - Partial cache refresh started in background ?

  The SAP error message SAI_CACHE109 indicates that a partial cache refresh has been initiated in the background. This message is typically related to the SAP BW (Business Warehouse) or SAP HANA environments where caching mechanisms are used to improve performance by storing frequently accessed data.
  Cause:
  
  Data Changes: The most common cause for this message is that there have been changes in the underlying data (e.g., new data loads or updates) that require the cache to be refreshed to ensure that users are accessing the most current data.
  Scheduled Jobs: A scheduled job or process may have triggered the partial cache refresh as part of its execution.
  Manual Trigger: An administrator or user may have manually initiated a cache refresh for specific queries or InfoProviders.
  Performance Optimization: The system may automatically decide to refresh the cache to optimize performance based on certain thresholds or conditions.
  
  Solution:
  
  Monitor the Background Job: Check the status of the background job that initiated the partial cache refresh. You can do this using transaction codes like SM37 (Job Monitoring) to see if it completes successfully or if there are any issues.
  Wait for Completion: If the refresh is still in progress, it may be best to wait for it to complete. The system will automatically update the cache once the process is finished.
  Check for Errors: If the job fails, review the job logs for any error messages that can provide more context on what went wrong. This can help in troubleshooting the issue.
  Manual Cache Refresh: If necessary, you can manually refresh the cache using transaction codes like RSRCACHE or RS_REFRESH to ensure that the cache is up to date.
  Review Data Load Processes: Ensure that data load processes are running smoothly and that there are no issues with data extraction or transformation that could be causing repeated cache refreshes.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SM37: Job Monitoring
  RSRCACHE: Cache Management
  RS_REFRESH: Refresh Cache
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to cache management and performance.
  Performance Tuning: Consider reviewing your BW or HANA performance tuning settings to optimize how caching is handled, especially if you frequently encounter this message.
  Documentation: Refer to SAP documentation for more detailed information on caching mechanisms and best practices for managing cache in BW or HANA environments.
  
  By following these steps, you should be able to address the SAI_CACHE109 error and ensure that your SAP system is functioning optimally.