How To Fix /UI2/CACHE028 - [ &1 ] Preparation of rule '&2' required &3 milliseconds

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/CACHE -

• Message number: 028

• Message text: [ &1 ] Preparation of rule '&2' required &3 milliseconds

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 /UI2/CACHE028 - [ &1 ] Preparation of rule '&2' required &3 milliseconds ?

  The SAP error message /UI2/CACHE028 typically relates to performance issues in the SAP Fiori/UI5 framework, specifically concerning the preparation of a cache rule. This message indicates that the system took a certain amount of time (in milliseconds) to prepare a specific rule, which can be a sign of performance bottlenecks or inefficiencies in the caching mechanism.
  Cause:
  
  Heavy Load on the System: The system may be experiencing a high load, leading to longer processing times for cache preparation.
  Inefficient Cache Configuration: The cache rules may not be optimally configured, leading to unnecessary delays in rule preparation.
  Large Data Volume: If the application is dealing with a large volume of data, it may take longer to prepare the cache.
  Network Latency: If the application is accessing remote services or databases, network latency can contribute to the delay.
  System Performance Issues: General performance issues with the SAP system, such as insufficient resources (CPU, memory), can also lead to longer processing times.
  
  Solution:
  
  Optimize Cache Configuration: Review and optimize the cache rules in the SAP Fiori/UI5 application. Ensure that only necessary data is cached and that the cache is configured correctly.
  Monitor System Performance: Use SAP monitoring tools (like SAP Solution Manager) to check for system performance issues. Look for CPU, memory, and I/O bottlenecks.
  Analyze Load: Check if there are any spikes in user load or background jobs that could be affecting performance. Consider load balancing or scheduling jobs during off-peak hours.
  Database Optimization: Ensure that the underlying database is optimized. This may include indexing, query optimization, and regular maintenance tasks.
  Network Optimization: If network latency is an issue, consider optimizing network configurations or using local caching strategies.
  Update and Patch: Ensure that your SAP system is up to date with the latest patches and updates, as performance improvements are often included in these releases.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to caching and performance issues in Fiori/UI5 applications. SAP frequently releases notes that address specific performance problems.
  SAP Community: Engage with the SAP Community forums to see if other users have experienced similar issues and what solutions they have found.
  Performance Analysis Tools: Utilize tools like SAP Fiori Performance Analysis or transaction ST03N to analyze performance metrics and identify bottlenecks.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the performance of your SAP Fiori/UI5 applications and reduce the occurrence of the /UI2/CACHE028 error message.