How To Fix RT065 - Buffer: Percentage use of directory

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 065

• Message text: Buffer: Percentage use of directory

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RT065 - Buffer: Percentage use of directory ?

  The SAP error message RT065, which indicates "Buffer: Percentage use of directory," typically relates to the use of the SAP buffer, specifically the directory buffer. This buffer is used to store information about the objects in the SAP system, and when the percentage of its usage exceeds a certain threshold, it can lead to performance issues or errors.
  Cause:
  
  High Buffer Usage: The primary cause of this error is that the directory buffer is nearing its maximum capacity. This can happen due to a large number of objects being loaded into the buffer, which can occur in systems with heavy usage or many transactions.
  Configuration Issues: The buffer size may not be configured optimally for the workload of the system.
  Inefficient Data Access Patterns: If the application is accessing data in a way that leads to frequent buffer misses, it can cause the buffer to fill up quickly.
  
  Solution:
  
  
  Increase Buffer Size: 
  
  You can increase the size of the directory buffer in the SAP system configuration. This is done in the SAP profile parameters. The relevant parameters are:
  
  rdisp/buffer_size: This parameter controls the size of the buffer.
  rdisp/roll_area: This parameter can also be adjusted to optimize memory usage.
  
  
  After making changes, you will need to restart the SAP system for the changes to take effect.
  
  
  
  Monitor Buffer Usage: 
  
  Use transaction codes like SM12 (for lock entries) and SM21 (for system logs) to monitor buffer usage and identify any patterns or issues.
  Regularly check the buffer statistics using transaction ST02 (Tune Summary) to see how the buffers are performing.
  
  
  
  Optimize Data Access: 
  
  Review the application logic to ensure that it is accessing data efficiently. This may involve optimizing SQL queries or adjusting how data is loaded into the buffer.
  
  
  
  Clear Buffer: 
  
  In some cases, clearing the buffer can help. This can be done using transaction SM04 or SM12, but be cautious as this may impact system performance temporarily.
  
  
  
  Consult SAP Notes: 
  
  Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to buffer management.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like ST02, SM12, and SM21 for monitoring and managing buffer usage.
  SAP Documentation: Refer to the official SAP documentation for detailed information on buffer management and configuration.
  Performance Tuning: Consider engaging in performance tuning practices to ensure that the system is running optimally, which can help mitigate buffer-related issues.
  
  If the problem persists after trying these solutions, it may be beneficial to consult with SAP support or a professional with expertise in SAP system administration.