How To Fix SDBALM175 - High proportion of history/undo data in the data cache (&1&3 > &2&3)

SAP Error Message - Details

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 175

• Message text: High proportion of history/undo data in the data cache (&1&3 > &2&3)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM175 - High proportion of history/undo data in the data cache (&1&3 > &2&3) ?

  The SAP error message SDBALM175 indicates that there is a high proportion of history or undo data in the data cache, which can lead to performance issues in the database. This message typically arises in the context of SAP's database management, particularly when using the SAP HANA database or other databases supported by SAP.
  Cause:
  The error message SDBALM175 is triggered when the amount of history or undo data in the data cache exceeds a certain threshold. This can happen due to several reasons:
  
  High Transaction Volume: A large number of transactions being processed can lead to an accumulation of undo data.
  Long-Running Transactions: Transactions that take a long time to complete can generate a significant amount of undo data.
  Insufficient Cache Size: The data cache may not be sized appropriately to handle the volume of data being processed.
  Inefficient Data Management: Poorly optimized database operations or lack of proper data management strategies can lead to excessive history/undo data.
  
  Solution:
  To resolve the SDBALM175 error, consider the following steps:
  
  
  Monitor and Analyze Transactions:
  
  Use transaction monitoring tools to identify long-running transactions and optimize them.
  Review the application logic to ensure that transactions are as efficient as possible.
  
  
  
  Increase Data Cache Size:
  
  If the data cache is too small, consider increasing its size to accommodate more data. This can be done through database configuration settings.
  
  
  
  Regularly Clear Undo Data:
  
  Implement regular maintenance tasks to clear out old undo data. This can include setting up a schedule for database cleanup operations.
  
  
  
  Optimize Database Configuration:
  
  Review and optimize database parameters related to memory allocation and cache management. Ensure that the database is configured to handle the expected workload.
  
  
  
  Database Performance Tuning:
  
  Conduct performance tuning on the database to improve overall efficiency. This may involve indexing, query optimization, and other best practices.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes or updates that may address this specific issue. SAP frequently releases patches and updates that can resolve known issues.
  
  
  
  Related Information:
  
  SAP HANA Database: If you are using SAP HANA, refer to the HANA Administration Guide for best practices on managing memory and cache.
  Transaction Management: Understanding how transactions are managed in your specific SAP application can help in optimizing performance.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide insights based on your specific system configuration and usage patterns.
  
  By following these steps, you should be able to mitigate the issue related to the SDBALM175 error and improve the performance of your SAP system.