How To Fix LVCALM032 - Low hit rate in SQL data cache (&1 < &2%)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 032

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

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LVCALM032 - Low hit rate in SQL data cache (&1 < &2%) ?

  The SAP error message LVCALM032 indicates that the SQL data cache has a low hit rate, meaning that a significant number of SQL queries are not being served from the cache, leading to performance issues. The message typically specifies the current hit rate and the threshold that has been set (e.g., &1 < &2%).
  Cause:
  
  
  Low Hit Rate: The SQL data cache is not effectively caching SQL statements, which can be due to:
  
  A high number of unique SQL statements being executed, leading to cache thrashing.
  Insufficient memory allocated to the SQL data cache.
  Inefficient SQL queries that do not benefit from caching.
  Changes in the database schema or data that invalidate cached SQL statements.
  
  
  
  Configuration Issues: The configuration settings for the SQL cache may not be optimal for the workload.
  
  
  Database Load: High load on the database can lead to increased demand for SQL execution, which may exceed the cache's ability to serve requests.
  
  
  Solution:
  
  
  Increase SQL Data Cache Size:
  
  You can increase the size of the SQL data cache in the SAP system profile parameters. Look for parameters like abap/SQL/CacheSize and adjust them according to your system's memory capacity and workload.
  
  
  
  Optimize SQL Queries:
  
  Review and optimize the SQL queries being executed. Ensure that they are efficient and make use of indexes where appropriate.
  
  
  
  Monitor and Analyze:
  
  Use transaction codes like ST02 (Buffer Monitor) and ST04 (Database Performance Monitor) to analyze the performance of the SQL cache and identify problematic queries.
  
  
  
  Adjust Cache Parameters:
  
  Review and adjust other related parameters, such as abap/SQL/CacheHitRate, to ensure they align with your performance goals.
  
  
  
  Database Tuning:
  
  Work with your database administrator to tune the database settings and ensure that the database itself is optimized for performance.
  
  
  
  Regular Maintenance:
  
  Regularly perform database maintenance tasks, such as updating statistics and rebuilding indexes, to ensure optimal performance.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  ST02: Monitor buffer and cache performance.
  ST04: Monitor database performance.
  ST03N: Analyze workload and performance statistics.
  
  
  
  SAP Notes: Check SAP Notes related to SQL performance and caching for specific recommendations and updates.
  
  
  Documentation: Refer to SAP documentation for best practices on SQL performance tuning and cache management.
  
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the SQL data cache hit rate and enhance overall system performance.