<![CDATA[CPU Usage of empty server]]>Hi,
why xcp-ng and xoa are using so much of cpu while nothing is running?
I have host with xcp-ng 8.3 + xoa installed from xo-lite.

There is nothing else on that host and this is only host in pool but it's using 30% of cpu all the time?
Is this normal for xcp-ng and xoa?

Pool stats:
ba774850-1669-4543-8dd2-0f0fd5c28a7f-image.jpeg
Host stats:
f08a5032-673a-428d-b89d-b734d42b370d-image.jpeg
XOA VM stats:
7807ea87-561d-4ede-99d5-ea3156cf0605-image.jpeg

]]>https://xcp-ng.org/forum/topic/12055/cpu-usage-of-empty-serverRSS for NodeSat, 10 Oct 2026 21:06:35 GMTMon, 06 Apr 2026 07:54:18 GMT60<![CDATA[Reply to CPU Usage of empty server on Thu, 23 Jul 2026 14:34:20 GMT]]>i think im seeing the same with fake cpu spikes. I started a second pool yesterday to patch and left it on over night. typically i just shut it down once done so the servers dont get too far behind patching.
Under the pool stats im seeing spikes but under hosts nothing.
It doesnt really bother me, but figure i add to the thread that im also seeing it.

c75fecec-d618-4f05-a931-edea6bc6ecce-image.jpeg
1b9ea5aa-d349-4ff8-af89-30a970d36fbb-image.jpeg

0f579999-cd96-4216-a0d4-d637ea5febf1-image.jpeg

]]>https://xcp-ng.org/forum/post/107193https://xcp-ng.org/forum/post/107193Thu, 23 Jul 2026 14:34:20 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 17:05:11 GMT]]>

@jerry1333 said:

There is nothing else on that host and this is only host in pool but it's using 30% of cpu all the time?

it's not using 30% of CPU, you see a graph of cumulated (switch is on) core consumption of your 32 cores.

never switch this on. it adds up like that : 32x1%=32%, wrongfully letting you think you are at 30%ish CPU usage.

]]>https://xcp-ng.org/forum/post/104238https://xcp-ng.org/forum/post/104238Tue, 07 Apr 2026 17:05:11 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 16:49:30 GMT]]>haaaa on the pool stats, it spikes to 50% (but I have 2 hosts in this pool)
ac5f6702-3e3a-434d-bb01-3bc99d997aa4-image.jpeg

my guess ? false positive 🙂 real monitoring do not add up to what we see in XOA stats.
I think we're down a rabbit hole

@olivierlambert told once that these stat graphs have not been updated for 10 years.

]]>https://xcp-ng.org/forum/post/104237https://xcp-ng.org/forum/post/104237Tue, 07 Apr 2026 16:49:30 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 16:46:49 GMT]]>@jerry1333 I have an empty server in a pool, I do see some regulare bumps in the network, probably XOA polling RRDs for the stats from the master.

but no spikes in CPU as you have
b953cca1-d4fc-4457-a542-67680ddec4f9-image.jpeg

]]>https://xcp-ng.org/forum/post/104236https://xcp-ng.org/forum/post/104236Tue, 07 Apr 2026 16:46:49 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 16:06:07 GMT]]>@Pilow After disabling netdata service cpu usage droped by 10% on both host and pool.
1a9e7823-c5c7-4d22-ba3d-113e1aa85816-image.jpeg
3d65987c-16ca-4dc3-b83f-6906c5564fa0-image.jpeg

Step in right direction, thanks 🙂

I was expecting empty server cpu usage on 2-5% level but maybe xcp behaves like this and it is normal?

]]>https://xcp-ng.org/forum/post/104235https://xcp-ng.org/forum/post/104235Tue, 07 Apr 2026 16:06:07 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 15:44:55 GMT]]>followed by a

systemctl disable netdata

it should get rid of it, no easy way by XOA UI to disable this

]]>https://xcp-ng.org/forum/post/104234https://xcp-ng.org/forum/post/104234Tue, 07 Apr 2026 15:44:55 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 15:43:29 GMT]]>@jerry1333 on your host

# systemctl status netdata
● netdata.service - Real time performance monitoring
   Loaded: loaded (/usr/lib/systemd/system/netdata.service; enabled; vendor preset: disabled)
   Active: active (running) since Sun 2026-02-01 13:55:32 +04; 2 months 4 days ago
  Process: 2425 ExecStartPre=/usr/libexec/netdata/xcpng-iptables-restore.sh (code=exited, status=0/SUCCESS)
 Main PID: 2464 (netdata)
   Memory: 355.1M
   CGroup: /system.slice/netdata.service
           ├─   2464 /usr/sbin/netdata -D
           ├─   2466 spawn-plugins
           ├─   2724 /usr/libexec/netdata/plugins.d/network-viewer.plugin 1
           ├─   2739 /usr/libexec/netdata/plugins.d/apps.plugin 1
           ├─   2743 /usr/libexec/netdata/plugins.d/systemd-journal.plugin 1
           ├─   2745 spawn-setns
           ├─2300997 /usr/libexec/netdata/plugins.d/debugfs.plugin 1
           └─3392346 /usr/bin/bash /usr/libexec/netdata/plugins.d/tc-qos-helper.sh 1

try that :

systemctl stop netdata
]]>https://xcp-ng.org/forum/post/104233https://xcp-ng.org/forum/post/104233Tue, 07 Apr 2026 15:43:29 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 15:41:49 GMT]]>If I kill netdata process it will come back by it self.

]]>https://xcp-ng.org/forum/post/104232https://xcp-ng.org/forum/post/104232Tue, 07 Apr 2026 15:41:49 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 15:38:25 GMT]]>@Pilow did that but netdata on host is still working :
c61dcf2f-2337-4c69-83ae-a8f657947412-image.jpeg

]]>https://xcp-ng.org/forum/post/104230https://xcp-ng.org/forum/post/104230Tue, 07 Apr 2026 15:38:25 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 15:25:15 GMT]]>@jerry1333 you could try to stop & disable auto load plugin in SETTING/PLUGINS
7398f8dd-4dd1-49de-9ab2-727a804310b4-image.jpeg

and restart host ?

]]>https://xcp-ng.org/forum/post/104229https://xcp-ng.org/forum/post/104229Tue, 07 Apr 2026 15:25:15 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 15:21:15 GMT]]>@Pilow Yes, it was enabled, then cpu usage shown on pool was around 50%.
When I disable plugin then it gets back to ~30%.

Is there a way to remove netdata from host?

Anyway I will wipe this server and try new install with custom xoa (self compiled) and keep watching how it will behave.

]]>https://xcp-ng.org/forum/post/104228https://xcp-ng.org/forum/post/104228Tue, 07 Apr 2026 15:21:15 GMT<![CDATA[Reply to CPU Usage of empty server on Tue, 07 Apr 2026 05:33:16 GMT]]>@jerry1333 nothing obvious.. except for NETDATA popping on your host
7a0648b8-058a-4b28-8a8e-b7f0b47fff75-image.jpeg

did you enable advanced telemetry ? could be it

]]>https://xcp-ng.org/forum/post/104206https://xcp-ng.org/forum/post/104206Tue, 07 Apr 2026 05:33:16 GMT<![CDATA[Reply to CPU Usage of empty server on Mon, 06 Apr 2026 19:16:02 GMT]]>XOA htop looks like this:
ff4865df-0387-4ea6-85b6-29ab928911d2-image.jpeg

Video from xoa and xo:
https://imgur.com/a/SUyppQr

]]>https://xcp-ng.org/forum/post/104199https://xcp-ng.org/forum/post/104199Mon, 06 Apr 2026 19:16:02 GMT<![CDATA[Reply to CPU Usage of empty server on Mon, 06 Apr 2026 09:32:51 GMT]]>@jerry1333 could you do a TOP in XOA vm to identify what consumes CPU ?

]]>https://xcp-ng.org/forum/post/104187https://xcp-ng.org/forum/post/104187Mon, 06 Apr 2026 09:32:51 GMT