Virtualization
Environment
Environment
Windows Server guest on Proxmox with host and domain time synchronization enabled.
What happens
What happens
The guest clock jumps after snapshots and gradually diverges between corrections.
What I have tried
What I have tried
Changed public NTP servers inside the guest.
I would appreciate advice on how to identify the root cause without risking existing data or configuration.
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AI DIAGNOSTICS
Incident analysis
Most likely causes
The guest receives competing time corrections from the hypervisor and domain hierarchy. 83%
A recent software, firmware or configuration change is exposing an existing compatibility issue. 35%
Summary
The reported behaviour is consistent with the guest receives competing time corrections from the hypervisor and domain hierarchy. The safest next step is to verify that hypothesis with a reversible test before making permanent configuration changes.
Suggested Fixes
Verify the likely cause
Use the recommended paravirtualized clock, choose one authoritative synchronization path and verify host time stability.
Validate and monitor
Reproduce the issue once after the change, review relevant logs or metrics, and keep a rollback path until the system has remained stable.
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