How To Fix LVCALM034 - High fill level 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: 034

• Message text: High fill level 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 LVCALM034 - High fill level in SQL data cache (&1 > &2%) ?

  The SAP error message LVCALM034 indicates that the SQL data cache has reached a high fill level, which can lead to performance issues or even system instability if not addressed. The message typically includes two parameters: &1, which represents the current fill level of the SQL data cache, and &2, which represents the threshold percentage that has been set.
  Cause:
  The high fill level in the SQL data cache can be caused by several factors, including:
  
  Excessive Data Volume: A large volume of data being processed or retrieved can fill the cache quickly.
  Inefficient Queries: Poorly optimized SQL queries can lead to excessive data being loaded into the cache.
  Insufficient Cache Size: The configured size of the SQL data cache may be too small for the workload being processed.
  Frequent Data Changes: If the underlying data changes frequently, it can lead to cache thrashing, where the cache is constantly being filled and emptied.
  
  Solution:
  To resolve the high fill level in the SQL data cache, consider the following actions:
  
  Monitor and Analyze Cache Usage: Use transaction codes like ST02 (Buffer Monitor) to analyze the SQL cache usage and identify which queries are consuming the most resources.
  Optimize SQL Queries: Review and optimize the SQL queries that are causing high cache usage. This may involve adding indexes, rewriting queries, or reducing the amount of data being retrieved.
  Increase Cache Size: If the current cache size is insufficient, consider increasing the size of the SQL data cache. This can be done in the SAP system profile parameters (e.g., abap/SQL/SQL_CACHE_SIZE).
  Adjust Cache Parameters: Review and adjust other related parameters that control caching behavior, such as abap/SQL/SQL_CACHE_MAX_ENTRIES.
  Regular Maintenance: Implement regular maintenance tasks to clear the cache and ensure that it does not become overloaded. This can include periodic restarts of the application server or scheduled cache clearing.
  Check for System Updates: Ensure that your SAP system is up to date with the latest patches and updates, as performance improvements and bug fixes may help alleviate cache issues.
  
  Related Information:
  
  Transaction Codes: Use ST02 for monitoring buffer and cache usage, and ST04 for database performance analysis.
  SAP Notes: Check SAP Notes related to SQL performance and caching issues for specific guidance and recommendations.
  Documentation: Refer to SAP documentation for detailed information on SQL caching and performance tuning.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the high fill level in the SQL data cache and improve overall system performance.