How To Fix DB11165 - &1 > &2: reads / user call ratio above threshold

SAP Error Message - Details

• Message type: E = Error

• Message class: DB11 - Oracle Monitor: messages

• Message number: 165

• Message text: &1 > &2: reads / user call ratio above threshold

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB11165 - &1 > &2: reads / user call ratio above threshold ?

  The SAP error message DB11165 indicates that the reads/user call ratio has exceeded a predefined threshold. This typically points to performance issues in the database, where the number of read operations (such as database reads) is disproportionately high compared to the number of user calls (such as transactions or queries initiated by users). 
  Cause:
  
  High Read Operations: The application may be performing too many read operations, which can be due to inefficient queries, lack of proper indexing, or excessive data retrieval.
  Poorly Optimized Queries: Queries that are not optimized can lead to excessive reads, causing the ratio to exceed the threshold.
  Database Configuration: The database may not be configured optimally for the workload, leading to increased read operations.
  Data Volume: A large volume of data being processed or retrieved can also contribute to a high read/user call ratio.
  Caching Issues: If the database cache is not effectively utilized, it may lead to more reads from the disk rather than from memory.
  
  Solution:
  
  Analyze Queries: Use tools like SQL trace (ST05) or the SQL performance monitor to identify and analyze the queries that are causing high read operations. Optimize these queries to reduce the number of reads.
  Indexing: Ensure that the database tables are properly indexed. Adding or modifying indexes can significantly reduce the number of reads required for certain queries.
  Database Tuning: Review and adjust database parameters to optimize performance. This may include adjusting memory allocation, cache sizes, and other configuration settings.
  Review Application Logic: Check the application logic to ensure that it is not making unnecessary calls to the database. This may involve reducing the frequency of certain operations or batching requests.
  Monitor Performance: Continuously monitor the database performance to identify trends and potential issues before they become critical.
  Increase Threshold: If the high read/user call ratio is acceptable for your specific use case, consider increasing the threshold in the database configuration. However, this should be done with caution and a thorough understanding of the implications.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to performance tuning and specific error messages for additional guidance and best practices.
  Database Documentation: Refer to the documentation for your specific database (e.g., HANA, Oracle, SQL Server) for performance tuning tips and configuration settings.
  SAP Community: Engage with the SAP Community forums to seek advice from other users who may have encountered similar issues.
  
  By addressing the underlying causes and implementing the suggested solutions, you can reduce the read/user call ratio and improve overall database performance.