How To Fix DB6PM165 - Number of block pages has been reduced to 98% of buffer pool size

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 165

• Message text: Number of block pages has been reduced to 98% of buffer pool size

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM165 - Number of block pages has been reduced to 98% of buffer pool size ?

  The SAP error message DB6PM165 indicates that the number of block pages in the database has been reduced to 98% of the buffer pool size. This message is typically related to the database's memory management and buffer pool configuration. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Buffer Pool Configuration: The buffer pool is a memory area that caches database pages to improve performance. If the number of block pages exceeds a certain threshold (in this case, 98% of the buffer pool size), the database system may reduce the number of pages to maintain performance and stability.
  High Load or Inefficient Queries: If there are many concurrent queries or inefficient queries running, they may consume more buffer pool memory, leading to this warning.
  Database Growth: As the database grows, the existing buffer pool size may become insufficient to handle the increased data load, leading to this message.
  
  Solution:
  
  Increase Buffer Pool Size: If the buffer pool is consistently reaching high usage, consider increasing its size. This can be done through database configuration settings. Consult your database documentation for specific instructions on how to adjust the buffer pool size.
  Optimize Queries: Review and optimize any queries that may be consuming excessive resources. Use database performance monitoring tools to identify slow or resource-intensive queries.
  Monitor Database Performance: Regularly monitor the database performance metrics to understand memory usage patterns and adjust configurations accordingly.
  Database Maintenance: Perform regular database maintenance tasks such as indexing, updating statistics, and cleaning up unused data to improve overall performance and reduce memory consumption.
  Review Application Load: If the application is generating a high load on the database, consider optimizing the application logic or scaling the application infrastructure.
  
  Related Information:
  
  Database Documentation: Refer to the specific database documentation (e.g., SAP HANA, Oracle, SQL Server) for detailed instructions on managing buffer pools and memory settings.
  SAP Notes: Check SAP Notes for any known issues or recommendations related to this error message.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools or third-party tools to analyze database performance and identify bottlenecks.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the DB6PM165 error and improve overall database performance.