How To Fix DB6156 - Percentage of the dirty page threshold cleaners

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 156

• Message text: Percentage of the dirty page threshold cleaners

INCLUDE BC_DB6_CLEANER OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message DB6156 - Percentage of the dirty page threshold cleaners ?

  The SAP error message DB6156, which refers to the "Percentage of the dirty page threshold cleaners," typically relates to the database's management of dirty pages in memory. This error is often associated with the database's performance and its ability to manage memory effectively.
  Cause:
  The error message DB6156 indicates that the percentage of dirty pages in the database buffer pool has exceeded a certain threshold. Dirty pages are those that have been modified in memory but not yet written to disk. When the percentage of dirty pages becomes too high, it can lead to performance issues, as the database may struggle to manage memory and may not be able to efficiently write changes to disk.
  Solution:
  To resolve this issue, consider the following steps:
  
  
  Increase the Buffer Pool Size: If the buffer pool is too small, it may lead to a higher percentage of dirty pages. Increasing the buffer pool size can help accommodate more data and reduce the number of dirty pages.
  
  
  Adjust the Dirty Page Threshold: Depending on your database configuration, you may be able to adjust the threshold for dirty pages. This can help prevent the error from occurring if the current threshold is too low for your workload.
  
  
  Optimize Database Operations: Review your database operations to ensure that they are optimized. This includes checking for long-running transactions that may be holding onto dirty pages for extended periods.
  
  
  Regularly Monitor and Tune Performance: Use monitoring tools to keep an eye on the percentage of dirty pages and other performance metrics. Regular tuning of the database can help maintain optimal performance.
  
  
  Check for Long-Running Transactions: Identify and address any long-running transactions that may be contributing to the accumulation of dirty pages.
  
  
  Database Maintenance: Perform regular database maintenance tasks, such as backups and consistency checks, to ensure that the database is functioning optimally.
  
  
  Related Information:
  
  Database Configuration: Review the database configuration settings related to memory management and buffer pool settings.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools or third-party solutions to analyze database performance and identify bottlenecks.
  
  If the issue persists after trying these solutions, it may be beneficial to consult with SAP support or a database administrator for further assistance.