How To Fix VIRT149 - Free Virtual Memory

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 149

• Message text: Free Virtual Memory

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT149 - Free Virtual Memory ?

  The SAP error message VIRT149, which indicates "Free Virtual Memory," typically arises when the system is running low on virtual memory. This can occur in environments where the SAP application server is unable to allocate sufficient memory for its operations, leading to performance issues or even system crashes.
  Cause:
  
  Insufficient Virtual Memory: The operating system has a limit on the amount of virtual memory that can be allocated, and if this limit is reached, SAP may not be able to allocate the memory it needs.
  Memory Leaks: Applications or processes that do not release memory properly can lead to a gradual depletion of available virtual memory.
  Configuration Issues: Incorrect settings in the SAP system or the underlying operating system can lead to inefficient memory usage.
  High Workload: A sudden increase in workload or user activity can lead to a spike in memory usage, causing the system to run out of available virtual memory.
  
  Solution:
  
  
  Increase Virtual Memory:
  
  On Windows, you can increase the paging file size. Go to System Properties > Advanced > Performance Settings > Advanced > Virtual Memory, and adjust the paging file size.
  On Unix/Linux systems, you may need to adjust swap space or configure additional swap files.
  
  
  
  Optimize SAP Memory Settings:
  
  Review and adjust the SAP memory parameters in the instance profile (e.g., abap/heap_area_dia, abap/heap_area_nondia, abap/heap_area_total).
  Use transaction RZ10 to modify the instance profile and restart the instance for changes to take effect.
  
  
  
  Monitor and Analyze Memory Usage:
  
  Use transaction ST02 (Tune Summary) to monitor memory usage and identify any bottlenecks.
  Check for memory leaks or inefficient memory usage in custom programs or background jobs.
  
  
  
  System Cleanup:
  
  Regularly perform system maintenance tasks, such as deleting old logs, archiving data, and cleaning up temporary files.
  
  
  
  Upgrade Hardware:
  
  If the system consistently runs low on memory, consider upgrading the server hardware to provide more RAM or better performance.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to memory management or the VIRT149 error.
  
  
  
  Related Information:
  
  SAP Memory Management: Understanding how SAP manages memory can help in configuring the system optimally. Familiarize yourself with the different memory areas (e.g., heap memory, buffer memory).
  Operating System Limits: Be aware of the limits imposed by the operating system on virtual memory and how they can be adjusted.
  Performance Monitoring Tools: Utilize tools like SAP Solution Manager or third-party monitoring solutions to keep track of system performance and memory usage.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the VIRT149 error and improve the overall performance of your SAP system.