What is HYPER-V-MEM-OVERCOMMIT?
This high-severity issue affects the Windows operating system. A Hyper-V VM crashes or Windows host becomes unresponsive due to memory overcommitment. Use the steps below to track down and fix the cause.
Common Causes
- Total VM RAM allocation exceeds host physical RAM
- Dynamic memory not configured
- Host running other memory-heavy processes simultaneously
Step-by-Step Fix Guide
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1
Enable Dynamic Memory for the VM in Hyper-V Manager
"Enable Dynamic Memory for the VM in Hyper-V Manager" is worth trying when dynamic memory not configured turns out to be the culprit.
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2
Reduce the VM startup RAM
"Reduce the VM startup RAM" covers a less common but documented cause of HYPER-V-MEM-OVERCOMMIT.
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3
Close memory-intensive host applications
"Close memory-intensive host applications" is worth trying when total VM RAM allocation exceeds host physical RAM turns out to be the culprit.
Commands & Diagnostics
Get-VM | Select Name,MemoryAssigned
Get-VMMemory
Frequently Asked Questions
Total VM RAM allocation exceeds host physical RAM accounts for the majority of HYPER-V-MEM-OVERCOMMIT reports; dynamic memory not configured and host running other memory-heavy processes simultaneously come up less often but are documented.
Most HYPER-V-MEM-OVERCOMMIT reports resolve after "Enable Dynamic Memory for the VM in Hyper-V Manager". The rest of the guide above is there for the cases that don't.
HYPER-V-MEM-OVERCOMMIT is a high-severity error. It won't damage your PC instantly, but repeated occurrences usually point to a deeper problem worth addressing soon.
You shouldn't need to. Work through the guide above first — a reinstall is only worth considering if none of those steps help.
Sometimes. Microsoft regularly releases patches that fix known BSOD triggers including HYPER-V-MEM-OVERCOMMIT. Make sure Windows is fully up to date via Settings → Windows Update before attempting more advanced fixes.
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