How To Fix /SDF/DB6017 - The catalog cache hit ratio is too low

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/DB6 -

• Message number: 017

• Message text: The catalog cache hit ratio is too low

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/DB6017 - The catalog cache hit ratio is too low ?

  The SAP error message /SDF/DB6017 The catalog cache hit ratio is too low typically indicates that the system is experiencing performance issues related to the database catalog cache. This cache is used to store metadata about database objects, and a low hit ratio suggests that the system is frequently needing to access the database catalog, which can lead to slower performance.
  Cause
  The low catalog cache hit ratio can be caused by several factors, including:
  
  Insufficient Cache Size: The cache may not be large enough to hold all the necessary metadata, leading to frequent cache misses.
  High Database Activity: A high volume of database operations can lead to increased demand for catalog access, which may exceed the cache's capacity.
  Frequent Schema Changes: If there are frequent changes to the database schema (like adding or dropping tables), it can lead to cache invalidation and lower hit ratios.
  Database Configuration: Suboptimal database configuration settings can also contribute to low cache performance.
  
  Solution
  To address the low catalog cache hit ratio, consider the following solutions:
  
  Increase Cache Size: If possible, increase the size of the catalog cache. This can often be done through database configuration settings.
  Monitor Database Activity: Use monitoring tools to analyze database activity and identify any patterns or spikes that may be causing the issue.
  Optimize Queries: Review and optimize SQL queries to reduce the load on the database and minimize the need for catalog access.
  Review Schema Changes: Limit the frequency of schema changes if possible, or ensure that changes are made in a way that minimizes cache invalidation.
  Database Tuning: Perform general database tuning and optimization to improve overall performance, which may indirectly help with the catalog cache hit ratio.
  Consult Documentation: Refer to the specific database documentation for additional tuning parameters and recommendations related to catalog cache management.
  
  Related Information
  
  Monitoring Tools: Use SAP's monitoring tools (like SAP Solution Manager) or database-specific tools to track performance metrics and identify issues.
  Database Logs: Check database logs for any warnings or errors that may provide additional context for the low hit ratio.
  SAP Notes: Search for relevant SAP Notes that may provide specific guidance or patches related to this error message.
  Performance Analysis: Conduct a performance analysis to identify bottlenecks in the system that may be contributing to the issue.
  
  By addressing the underlying causes and implementing the suggested solutions, you can improve the catalog cache hit ratio and enhance overall database performance.