# Technical question — VM hard-rebooted ~3 minutes after provider's stated "performance adjustments." Assuming good faith on both sides, what hypervisor-layer scenarios fit this signature?

Looking for input from sysadmins and cloud infrastructure engineers on a recent VPS incident I'm struggling to fully square with the explanations received. Setup Windows Server VM on Kamatera (Type T plan — their burstable plan, described on their product page as offering "reserved resources guaranteed"). Single workload, no customer-side changes around the time of the incident. Sequence Following prior reports of intermittent freezing, the provider's support team emailed me confirming they had "performed several changes from our side to improve server performance and stability." Approximately three minutes later, my active RDP session was severed; on reconnect, the running application was terminated. No crash dialog, no recovery prompt. Note on timezones: all timestamps below are from the guest OS local clock. The provider's email at the time of the incident was within ~3 minutes of the unclean reboot, both referenced in the same timezone. Documented from the guest side (Event Viewer)

Event ID 41 (Kernel-Power) — present at 16:31:01 (unclean shutdown). Event ID 6008 — present at 16:31:04 (previous shutdown unexpected). Event ID 1074 — no entry in the incident timeframe. The nearest 1074 in the System log is at 17:58:36 (~1.5 hours later, corresponding to a normal subsequent restart). Confirms no user- or process-initiated shutdown around the crash. BugCheck event (Event ID 1001) — zero entries in the entire System log history (no BSOD has ever been recorded on this system). Application Error 1000 — no entry for the running application in the incident window. Local network connectivity — demonstrably uninterrupted (a parallel online session on my local machine continued through the entire window without packet loss).

Provider's position

Confirmed no manual reboot command was issued. Confirmed "performance and stability adjustments" were performed, but the specific actions were not described in concrete terms. Cited "company policy" as the basis for not sharing internal infrastructure logs, hypervisor audit records, or platform-level diagnostic data with customers. I respect this is a stated policy. After internal escalation, the position remained that, in their assessment, the issue did not originate from their infrastructure.

The technical question This isn't a complaint post. Assuming good faith on both sides — no customer-side shutdown, no OS or application crash, no local network failure, and no manual provider-side reboot command — what realistic hypervisor- or host-layer scenarios could produce exactly this signature roughly three minutes after a stated performance adjustment? Candidates I've considered:

A live migration that didn't complete cleanly Host node maintenance or an unplanned host reboot Automated remediation triggered by a monitoring threshold vCPU or NUMA reallocation that destabilized the VM A configuration change that required (or unintentionally triggered) a force reset

For those with hypervisor or cloud platform engineering experience: which of these is most consistent with the guest-side signature? Is there a scenario I'm missing? And in any of these cases, would the operation typically not be classified as a "reboot" in provider-side framing — i.e., could the provider truthfully state "we did not reboot the server" while still having performed something that produces exactly this signature?

##### Post Metadata
- Posted at: 3 months ago
- Author title: Quantitative Analyst
- Net upvotes: 1



## Related Product
[Kamatera](https://www.g2.com/products/kamatera/reviews)

## Related Category
[Infrastructure as a Service (IaaS)](https://www.g2.com/categories/infrastructure-as-a-service-iaas)

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