How To Fix DB6154 - Percentage of the dirty page steal cleaners

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 154

• Message text: Percentage of the dirty page steal cleaners

INCLUDE BC_DB6_CLEANER OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6154 - Percentage of the dirty page steal cleaners ?

  The SAP error message DB6154, which refers to the "Percentage of the dirty page steal cleaners," typically indicates an issue related to the database's memory management, specifically concerning the handling of dirty pages in the database buffer.
  Cause:
  The error message DB6154 is often triggered when the percentage of dirty pages in the database buffer exceeds a certain threshold. Dirty pages are those that have been modified in memory but not yet written to disk. If the system is unable to efficiently clean these dirty pages (i.e., write them to disk), it can lead to performance degradation and potential database issues.
  Solution:
  To address the DB6154 error, consider the following steps:
  
  
  Increase the Buffer Size: If the buffer is too small, it may not be able to handle the workload efficiently. Increasing the size of the database buffer can help accommodate more dirty pages and reduce the percentage of dirty pages.
  
  
  Optimize the Cleaners: Review the configuration of the page cleaners. Ensure that the number of cleaner threads is adequate for the workload. You may need to adjust the parameters related to the cleaning process.
  
  
  Monitor Database Activity: Use monitoring tools to analyze database activity. Look for long-running transactions or excessive write operations that may be contributing to the accumulation of dirty pages.
  
  
  Adjust Database Parameters: Review and adjust relevant database parameters that control the behavior of the buffer and the cleaning process. This may include parameters related to the dirty page threshold, cleaning frequency, and buffer management.
  
  
  Database Maintenance: Regularly perform database maintenance tasks, such as reorganizing tables and indexes, to improve overall performance and reduce the load on the buffer.
  
  
  Check for Locks or Contention: Investigate if there are any locks or contention issues that might be preventing the cleaning process from executing efficiently.
  
  
  Review Application Logic: Sometimes, the application logic can lead to excessive dirty pages. Review the application code to ensure that it is optimized for database interactions.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to DB6154. SAP frequently updates its knowledge base with solutions for known issues.
  Database Documentation: Refer to the documentation for your specific database (e.g., SAP HANA, MaxDB, etc.) for detailed information on buffer management and configuration settings.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools (like SAP Solution Manager) to gain insights into database performance and identify bottlenecks.
  
  By following these steps, you should be able to mitigate the issues related to the DB6154 error and improve the performance of your SAP system.