How To Fix LVCALM009 - Low hit rate in OMS data cache (&1 < &2%)

SAP Error Message - Details

• Message type: E = Error

• Message class: LVCALM - liveCache: Alert Monitor Objects and Attributes

• Message number: 009

• Message text: Low hit rate in OMS data cache (&1 < &2%)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LVCALM009 - Low hit rate in OMS data cache (&1 < &2%) ?

  The SAP error message LVCALM009 indicates that there is a low hit rate in the Order Management System (OMS) data cache. Specifically, it means that the percentage of cache hits is below a certain threshold, which can lead to performance issues in the system. The message typically includes two values: &1 (the current hit rate) and &2 (the minimum acceptable hit rate).
  Cause
  The low hit rate in the OMS data cache can be caused by several factors, including:
  
  Insufficient Cache Size: The cache may not be large enough to hold the frequently accessed data, leading to more cache misses.
  Data Volatility: If the data being accessed changes frequently, it may not remain in the cache long enough to be reused.
  Inefficient Queries: Queries that do not leverage the cache effectively can lead to a low hit rate.
  Configuration Issues: Incorrect configuration settings for the cache can also contribute to low performance.
  High Load: A sudden increase in system load can lead to cache thrashing, where the cache is constantly being filled and emptied.
  
  Solution
  To address the low hit rate in the OMS data cache, consider the following solutions:
  
  Increase Cache Size: If possible, increase the size of the cache to accommodate more data. This can help improve the hit rate.
  Optimize Queries: Review and optimize the queries being executed to ensure they are designed to take advantage of the cache.
  Adjust Cache Configuration: Check the configuration settings for the cache in the SAP system and adjust them as necessary to improve performance.
  Monitor Data Volatility: If the data changes frequently, consider strategies to reduce volatility or improve how the cache handles such data.
  Analyze System Load: Monitor system performance and load. If there are spikes in usage, consider load balancing or scaling resources to handle the demand.
  Regular Maintenance: Perform regular maintenance on the cache, such as clearing it periodically or refreshing it to ensure it contains relevant data.
  
  Related Information
  
  Transaction Codes: You can use transaction codes like SM12 (to check for locks), SM21 (to view system logs), and ST22 (to analyze dumps) to gather more information about system performance.
  Performance Monitoring: Use tools like SAP Solution Manager or transaction ST03N to analyze performance metrics and identify bottlenecks.
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or patches related to cache performance issues.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the hit rate in the OMS data cache and enhance overall system performance.