How To Fix LVCALM011 - Low hit rate in catalog cache (&1 < &2%)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 011

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

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LVCALM011 - Low hit rate in catalog cache (&1 < &2%) ?

  The SAP error message LVCALM011 indicates that there is a low hit rate in the catalog cache, which can affect the performance of your SAP system, particularly in the context of using the SAP List Viewer (ALV) or similar functionalities that rely on caching for efficient data retrieval.
  Cause:
  The error message typically arises when the hit rate of the catalog cache falls below a certain threshold (in this case, less than &2%). This can happen due to several reasons:
  
  Insufficient Cache Size: The cache may not be large enough to hold frequently accessed data, leading to a high number of cache misses.
  Data Volatility: If the data being accessed changes frequently, the cache may not be able to store relevant data effectively.
  Inefficient Queries: Queries that do not leverage the cache effectively can lead to low hit rates.
  Configuration Issues: Incorrect configuration settings for the cache can also lead to suboptimal performance.
  
  Solution:
  To address the low hit rate in the catalog cache, consider the following solutions:
  
  
  Increase Cache Size: Adjust the cache size settings in the SAP system to allow for more data to be stored. This can be done in the transaction code RZ10 or RZ11 depending on the parameters you need to change.
  
  
  Optimize Queries: Review and optimize the queries that are being executed. Ensure that they are designed to take advantage of the cache effectively.
  
  
  Monitor Cache Usage: Use transaction ST02 (Tune Summary) to monitor the cache usage and identify patterns or specific areas where the cache is not being utilized effectively.
  
  
  Adjust Cache Parameters: Check and adjust the parameters related to the catalog cache. This can include settings like LVC_CACHE_SIZE or other relevant parameters that control caching behavior.
  
  
  Regular Maintenance: Perform regular maintenance tasks such as clearing the cache or refreshing it to ensure that it contains the most relevant data.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this issue.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  ST02: Monitor buffer and cache performance.
  RZ10/RZ11: Change and view profile parameters.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more details on caching mechanisms and performance tuning.
  
  
  Performance Tuning: Consider engaging with SAP Basis or performance tuning experts if the issue persists, as they can provide deeper insights into system performance and configuration.
  
  
  By following these steps, you should be able to improve the hit rate in the catalog cache and enhance the overall performance of your SAP system.