How To Fix VIRT175 - Mem Alloc to Virtual Server (Resident set size)

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 175

• Message text: Mem Alloc to Virtual Server (Resident set size)

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT175 - Mem Alloc to Virtual Server (Resident set size) ?

  The SAP error message VIRT175 indicates that the memory allocation for a virtual server has exceeded the allowed limits, specifically related to the Resident Set Size (RSS). This can occur in environments where SAP applications are running, particularly in systems with limited memory resources or when the configuration settings are not optimized for the workload.
  Cause:
  
  Memory Limit Exceeded: The virtual server has reached its memory allocation limit, which can happen due to high workload, inefficient memory usage, or insufficient physical memory.
  Configuration Issues: The SAP instance may not be configured correctly to handle the expected load, leading to excessive memory consumption.
  Memory Leaks: There may be memory leaks in the application or in the underlying operating system, causing the memory usage to grow over time.
  Insufficient Resources: The underlying hardware may not have enough RAM to support the SAP instance's requirements, especially during peak usage times.
  
  Solution:
  
  Increase Memory Allocation: If possible, increase the memory allocation for the virtual server. This can be done through the virtualization platform (e.g., VMware, Hyper-V) settings.
  Optimize SAP Configuration: Review and optimize the SAP instance parameters related to memory usage. This includes adjusting parameters like abap/heap_area_dia, abap/heap_area_nondia, and others based on the workload.
  Monitor and Analyze Memory Usage: Use tools like SAP's transaction ST02 (Tune Summary) and ST03 (Workload Analysis) to monitor memory usage and identify any bottlenecks or inefficiencies.
  Check for Memory Leaks: Investigate the application and system for potential memory leaks. This may involve reviewing custom code, third-party add-ons, or even the operating system.
  Scale Up Resources: If the workload consistently exceeds the current memory limits, consider scaling up the hardware resources (adding more RAM) or scaling out by adding more instances.
  Review Operating System Settings: Ensure that the operating system is configured to allow sufficient memory for the SAP instance. This may involve adjusting kernel parameters or system settings.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide specific guidance or patches related to memory management and performance tuning.
  Documentation: Review SAP's official documentation on memory management and performance tuning for best practices.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the VIRT175 error and improve the performance and stability of your SAP environment.