How To Fix ESH_CA_CACHE027 - Index database used: algorithm &1, maximum entries &2

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_CA_CACHE - ESH Cache

• Message number: 027

• Message text: Index database used: algorithm &1, maximum entries &2

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 ESH_CA_CACHE027 - Index database used: algorithm &1, maximum entries &2 ?

  The SAP error message ESH_CA_CACHE027 typically relates to issues with the cache used in the SAP Enterprise Search (SAP ESH) system. This error indicates that the index database is using a specific algorithm and has reached its maximum number of entries. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Cache Limit Reached: The error suggests that the cache for the index database has reached its maximum capacity, which is defined by the parameters set in the system.
  Configuration Issues: The algorithm used for caching may not be optimal for the volume of data being processed, leading to performance issues or cache overflow.
  Data Volume: A significant increase in the volume of indexed data can lead to the cache being filled quickly, especially if the maximum entries are set too low.
  
  Solution:
  
  
  Increase Maximum Entries:
  
  You can increase the maximum number of entries allowed in the cache. This can typically be done in the configuration settings of the SAP ESH.
  Navigate to the relevant configuration settings in the SAP system and adjust the parameters for the cache size.
  
  
  
  Optimize Cache Algorithm:
  
  Review the algorithm being used for caching. Depending on your specific use case, switching to a more efficient algorithm may help manage the cache better.
  Consult SAP documentation or your system administrator for guidance on which algorithms are available and their implications.
  
  
  
  Clear Cache:
  
  If the cache is filled with outdated or unnecessary entries, consider clearing the cache to free up space. This can often be done through transaction codes or specific administrative functions in SAP.
  
  
  
  Monitor Data Volume:
  
  Keep an eye on the volume of data being indexed. If there is a significant increase, consider whether all data needs to be indexed or if some can be excluded to manage cache size better.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that can resolve underlying issues.
  
  
  
  Related Information:
  
  SAP ESH Documentation: Review the official SAP documentation for Enterprise Search to understand the caching mechanisms and best practices.
  Performance Monitoring: Use SAP tools to monitor the performance of the ESH and the cache to identify any bottlenecks or issues.
  System Administration: Work closely with your SAP Basis team or system administrators to ensure that the system is configured optimally for your specific use case.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.