How To Fix SDBALM187 - Low hit rate for OMS rollback data in the data cache (&1&3 < &2&3)

SAP Error Message - Details

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 187

• Message text: Low hit rate for OMS rollback data in the data cache (&1&3 < &2&3)

Self-Explanatory Message

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• What is the cause and solution for SAP error message SDBALM187 - Low hit rate for OMS rollback data in the data cache (&1&3 < &2&3) ?

  The SAP error message SDBALM187 indicates that there is a low hit rate for the Online Transaction Processing (OLTP) rollback data in the data cache. This can lead to performance issues, as the system is not efficiently retrieving the necessary rollback data from the cache, which can slow down transaction processing.
  Cause:
  The low hit rate for OMS (Order Management System) rollback data can be caused by several factors, including:
  
  Insufficient Cache Size: The cache may not be large enough to hold the required rollback data, leading to frequent cache misses.
  High Transaction Volume: A high volume of transactions can lead to rapid turnover of cached data, resulting in a lower hit rate.
  Inefficient Data Access Patterns: If the application is not accessing the rollback data in a predictable manner, it can lead to inefficient cache usage.
  Configuration Issues: Incorrect configuration settings for the cache can also lead to suboptimal performance.
  
  Solution:
  To address the low hit rate for OMS rollback data, consider the following solutions:
  
  Increase Cache Size: Review and increase the size of the data cache if it is found to be insufficient for the workload.
  Optimize Transaction Processing: Analyze the transaction patterns and optimize them to ensure that frequently accessed rollback data remains in the cache.
  Adjust Cache Configuration: Check the configuration settings for the cache and adjust them as necessary to improve performance.
  Monitor and Analyze Performance: Use SAP performance monitoring tools to analyze the cache hit rate and identify any bottlenecks or issues in the system.
  Database Tuning: Ensure that the underlying database is properly tuned for performance, as this can also impact the efficiency of the cache.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like ST02 (Tune Summary) and ST04 (Database Performance Analysis) to monitor and analyze the performance of the data cache.
  SAP Notes: Check for relevant SAP Notes that may provide additional insights or patches related to this error message.
  Documentation: Refer to SAP documentation for guidelines on cache management and performance tuning.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the hit rate for OMS rollback data and enhance overall system performance.