How To Fix VIRT237 - In Use 64KB Pages

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 237

• Message text: In Use 64KB Pages

What causes this issue?

The number of 64KB pages in real memory which are in use.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT237 - In Use 64KB Pages ?

  The SAP error message VIRT237 "In Use 64KB Pages" typically indicates that the SAP system is attempting to use 64KB pages for memory management, but there is an issue with the configuration or the environment that is preventing it from doing so. This error is often related to the underlying operating system and its memory management settings.
  Cause:
  
  Memory Configuration: The SAP system is configured to use large pages (64KB pages), but the operating system may not be set up to support this configuration.
  Insufficient Permissions: The user running the SAP instance may not have the necessary permissions to allocate large pages.
  Operating System Limitations: The operating system may not support large pages, or the configuration may not be optimized for their use.
  Kernel Parameters: Certain kernel parameters may not be set correctly to allow the use of large pages.
  
  Solution:
  
  Check Operating System Support: Ensure that your operating system supports large pages. For example, on Linux, you may need to check if the kernel is configured to support huge pages.
  Configure Huge Pages:
  
  For Linux, you can configure huge pages by modifying /etc/sysctl.conf or using the sysctl command to set parameters like vm.nr_hugepages.
  For Windows, you may need to enable large page support in the system settings.
  
  
  Set Permissions: Ensure that the user running the SAP instance has the necessary permissions to allocate large pages. This may involve adding the user to specific groups or modifying security settings.
  Adjust SAP Profile Parameters: Check the SAP instance profile parameters related to memory management. Ensure that parameters like abap/heap_area_dia and abap/heap_area_nondia are set appropriately.
  Review SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional configuration steps.
  Restart the SAP Instance: After making changes, restart the SAP instance to apply the new settings.
  
  Related Information:
  
  Documentation: Refer to the official SAP documentation for guidance on memory management and configuration.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Operating System Documentation: Consult the documentation for your specific operating system regarding large page support and configuration.
  
  If the issue persists after following these steps, it may be beneficial to contact SAP support for further assistance.