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Kamatera's VM hard-rebooted ~3 minutes after provider's stated "performance adjustments
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?
Comments
Yes experts, I look forward to your valuable opinions.
AI slop
won't read.
Have you tried turning it off and on again?
Would you read that if you were any of us?
sure at weekends vm is closed, but this problem occurs some
Why shouldn't I read it? My English and technical knowledge aren't very good, so I used AI for help. However, I checked the information and found nothing missing, excessive, or misleading. Was it the English text that was difficult, or the technical details?
Calling it nonsense without reading it is also nonsense.
I don't care if AI created it or if you wrote every word. It is completely excessive.
I tried before giving up
In the end, I gave you an advice because I explained why you weren't getting any help.
Improve your prompt, use another LLM. Or just use a translator.
Format your text better also.
I'm a human, not a robot.
But if you want i can use my LLM to react to your post, not sure you'll be happy with the answer.
Want to try ?
Your AI didn't share the useful details, like what resources your plan has. I'm not going to look it up just to tell you that your VPS crashed because it's under resourced. Burstable usually means can exceed X limit for a short amount of time, but you seem to be expecting them to be their permanently. And best guess with the minimal information provided is you overloaded the VM and crashed it
any relation with kamasutra?
sure if you have pro llm maybe it can be helpful
,
If you are a Kamatera customer, you can see that the description for the T-type processor states that resources are guaranteed. It also mentions that CPU usage above 10% is subject to an extra charge. My average weekly CPU usage is around 12-13%. I don't think this much CPU usage should cause a system crash. Furthermore, Windows log evidence proves that the system crash wasn't caused by the program I was using, and there were no blue screen logs. The system crash occurred after a system configuration that the technical support didn't explain. Since I'm not an expert in these technical matters and my English isn't good, I'm using AI to help me understand what can be done. My purpose in writing here is to get real opinions from more knowledgeable people, beyond what I or the AI might know, about the nature of the system problem and its possible causes.
Yes I have vm at kamatera. While they didn't share the logs, Kamatera stated in their first message that the problem wasn't their fault, but in their second message they said they performed a system reset, after which I had a hard reboot. They didn't explain what the system reset was due to company policy.
You still didn't mention what resources come with that VM, or what version of Windows you're using, or anything about the script you're running...which is all critical information for diagnosing potential issues and suggesting solutions.
But what a knowledgeable person would tell you is to setup monitoring so you know exactly what was happening with the VM when it crashed. That way you can explain the issue to your provider's support team and give them actionable data.
Hetrix Tools has a free-tier and is popular with users here. So get it setup, cause another crash and then report back with your findings so the knowledgeable people here will have something meaningful to engage with.
My virtual machine has 4 CPUs and 8 GB of RAM. Windows Server 2025 is installed. While idle, RAM usage is 2 GB. I only use the Matrix IQ program on the VM. While the program is running, RAM usage is around 6 GB, and CPU usage is around 12-13% on average.
I spoke with technical support. I ran Windows Event Viewer error scans and shared the logs. They said the problem might be due to the program. I showed them in the Windows logs that the program didn't crash or experience any blue screen errors. They didn't ask for any additional information. While they were making performance adjustments on their server side, my system experienced a hard reboot. Kamatera, due to company policy, didn't explain what they did. Also, why does their website state that T-type processors have guaranteed resources? I asked this three times, but they didn't answer any of my questions. They suggested switching to a B-type processor. A B-type processor is about 2 times more expensive than a T-type. Since the average CPU usage is around 13%, I honestly didn't want to switch.
I didn't know about the Hetrix program, I'll install and try it, thank you.
I think the most likely explanation is that it rebooted because they performed a system reset.
Probably the support agent saw the wall of text and couldn't be arsed to read it all and assumed OP just wanted a reboot.
Actually, no. My first message to them was, "I'm experiencing freezing issues on my system. Could you please check?" This long text is a summary of the ensuing exchanges. Their initial response was, of course, that there were no issues with their system. I replied that the problem was now fixed, but it had persisted for about an hour before I sent this message. I wish I hadn't. Whatever kind of performance optimization they did, without explaining it, my VM hard rebooted. Their only explanation was, "There are no problems with our systems." If there were no problems, why was my VM freezing? Why did they need a performance optimization? No answer or explanation. After such simple and unproven responses, it naturally raises doubts about trusting Kamatera. Their uptime seems good, but how can you trust them after this?
I think the "performance optimization" they performed was rebooting the vps. It would be a basic thing to try if there's a performance issue, especially considering it's windows.
Can you TLDR this to maybe 3 words?
I wish you hadn't used only seven words when writing this either.
I also noticed, the "Type T" plan you said you have isn't "reserved resources guaranteed." It is "Burstable CPU with baseline performance and ability to burst when needed. Cost-effective for variable workloads."
The "Type D" plan has "Server CPU are assigned to a dedicated physical CPU Core (2 threads) with reserved resources guaranteed."
So you've got the weaker CPU plan. You also didn't mention how much RAM you have. You might need more resources.
https://www.transfernow.net/dl/20260522bkKqJvad
Type T - Burstable - Server CPUs are assigned to a dedicated physical CPU thread with reserved resources guaranteed. Exceeding an average CPU usage of 10% will be extra charged for CPUs usage consumption.
You can confirm this from the screenshot.
Wouldn't it be more accurate to omit the word "reserved resources guaranteed"? They should write something like, "You can use more processor power when needed, within the limits of available resources."
I have 8 gb ram, windows server 2025 with program running ram used 6 gb. there is just only one program
Not going to open that, seems sketchy. But this is from the website.
What I wrote was exactly the same as the sentence in the CPU description: "If you want to change the server CPU type, this is the information in the CPU description." I copied and pasted it word for word: "Type T - Burstable - Server CPUs are assigned to a dedicated physical CPU thread with reserved resources guaranteed. Exceeding an average CPU usage of 10% will be extra charged for CPU usage consumption."> @david said:
I created a link because I couldn't copy the image here. Of course, you don't have to trust it. It's the sentence that appears in the description section when you go to settings to change the CPU base after becoming a member of Kamatera and renting a VM.
OK, whatever verbiage they use, it looks like "Type D" is the higher performance one with a dedicated core (not just some resources assigned to a "thread.")
Other than that, I don't know. 8 GB RAM seems OK, so maybe it's a network issue, or the server is just overloaded.
It also helps you to never learn and tells the addressed audience that they aren't worth making an actual effort.
If it happens again in the next week, move providers.
If not, then it correlates with the provider rebooting, internationally or accidentally is irrelevant.