How To Fix VIRT145 - Physical Memory Used by Hypervisor

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 145

• Message text: Physical Memory Used by Hypervisor

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 VIRT145 - Physical Memory Used by Hypervisor ?

  The SAP error message VIRT145, which indicates "Physical Memory Used by Hypervisor," typically relates to issues with the virtualization environment in which your SAP system is running. This error can occur in environments using hypervisors like VMware, Hyper-V, or others, and it usually points to memory allocation problems.
  Cause:
  
  Insufficient Memory Allocation: The hypervisor may not have enough physical memory allocated to the virtual machine (VM) running the SAP system.
  Memory Overcommitment: If the hypervisor is overcommitted on memory, it may lead to performance issues and errors like VIRT145.
  Resource Contention: Other VMs running on the same host may be consuming excessive memory, leading to insufficient resources for the SAP VM.
  Configuration Issues: Incorrect configuration settings in the hypervisor or the VM itself can lead to memory allocation problems.
  
  Solution:
  
  
  Increase Memory Allocation: 
  
  Check the current memory allocation for the SAP VM and increase it if necessary. Ensure that the VM has enough memory to handle the workload.
  
  
  
  Review Hypervisor Settings:
  
  Check the hypervisor settings to ensure that memory overcommitment is within acceptable limits. If necessary, adjust the settings to allocate more physical memory to the host.
  
  
  
  Monitor Resource Usage:
  
  Use monitoring tools to analyze memory usage across all VMs on the host. Identify any VMs that are consuming excessive memory and consider optimizing or shutting them down if they are not critical.
  
  
  
  Optimize SAP Configuration:
  
  Review the SAP instance profile parameters related to memory usage (e.g., abap/heap_area_dia, abap/heap_area_nondia, etc.) and adjust them based on the available resources.
  
  
  
  Upgrade Hardware:
  
  If the physical server is consistently running out of memory, consider upgrading the hardware to provide more physical memory.
  
  
  
  Consult Documentation:
  
  Refer to the documentation for your specific hypervisor for best practices on memory management and allocation.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to VIRT145 for any specific patches or updates that may address this issue.
  Hypervisor Documentation: Review the documentation for your hypervisor (e.g., VMware, Hyper-V) for guidelines on memory management and optimization.
  Performance Monitoring Tools: Utilize performance monitoring tools to keep track of memory usage and identify potential bottlenecks.
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the VIRT145 error and improve the performance of your SAP system running in a virtualized environment.