[PVE-User] native container strange cpu usage behaviour

Leandro Roggerone leandro at tecnetmza.com.ar
Fri May 7 17:32:42 CEST 2021


thanks Denis ,
>From same top command , I can notice that server is not blocked , take a
look to:
%Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,
In my opinion the server is not working at all.
Im missing something here ?

Strange thing is that cpu is still high after rebooting.
Do you think it is a common issue on proxmox containers ? perhaps related
to containers architecture , should I consider move my unbound to VM ?
Thanks.


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El vie, 7 may 2021 a las 11:26, Denis PUGNERE (<d.pugnere at ipnl.in2p3.fr>)
escribió:

>
> Buenos dias Leandeo,
>
> May be look at I/O errors, bad sectors on storage generate I/O wait on CPU
> without any processor activity.
> or another source : NFS server not responding.
>
> Cheers,
> Denis
>
> ----- Le 7 Mai 21, à 14:49, Leandro Roggerone leandro at tecnetmza.com.ar a
> écrit :
>
> > Hi guys.
> > I was running unbound dns on native proxmox container.
> > It is being monitored by librenms.
> > After some time running without any problem following happened.
> > First begin receiving snmp notifications regarding "high cpu/core
> > temperature"
> > (temperature was ok when checking at proxmox cli using sensor command)
> > Then I noticed that cpu is at %100 all time on lnms cpu graphs.
> > SO...
> > I take out dns queries , stoped unbound and rebooted container , then
> after
> > reboot, I have following top output.
> >
> > top - 12:46:02 up 52 min,  1 user,  load average:* 7.93, *5.49, 5.60
> > Tasks:  15 total,   1 running,  14 sleeping,   0 stopped,   0 zombie
> > %Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,
> > 0.0 st
> > KiB Mem :  8388608 total,  8141576 free,    39164 used,   207868
> buff/cache
> > KiB Swap:  8388604 total,  8388604 free,        0 used.  8349444 avail
> Mem
> >
> >  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+
> COMMAND
> >    1 root      20   0   43316   5052   3912 S   0.0  0.1   0:00.13
> systemd
> >   39 root      20   0   39092   6660   6372 S   0.0  0.1   0:00.03
> > systemd-journal
> >   51 root      20   0   41536   3132   2740 S   0.0  0.0   0:00.01
> > systemd-udevd
> >   57 dbus      20   0   58136   4200   3720 S   0.0  0.1   0:00.01
> > dbus-daemon
> >   58 root      20   0   26392   2928   2656 S   0.0  0.0   0:00.01
> > systemd-logind
> >   65 root      20   0    6524   1712   1588 S   0.0  0.0   0:00.00 agetty
> >   68 root      20   0    6524   1640   1520 S   0.0  0.0   0:00.00 agetty
> >   69 root      20   0    6524   1612   1488 S   0.0  0.0   0:00.00 agetty
> >   70 root      20   0   22708   2636   2012 S   0.0  0.0   0:00.00 crond
> >  273 root      20   0  112932   7688   6656 S   0.0  0.1   0:00.01 sshd
> >  275 root      20   0  218560   4996   4180 S   0.0  0.1   0:00.16
> rsyslogd
> >  276 root      20   0  124696  15860  10952 S   0.0  0.2   0:01.47 snmpd
> >  291 root      20   0  155340  10596   9240 S   0.0  0.1   0:00.18 sshd
> >  293 root      20   0   11944   3072   2596 S   0.0  0.0   0:00.06 bash
> >  490 root      20   0   56216   3944   3352 R   0.0  0.0   0:00.00 top
> >
> >
> > So ... Question is , why load average is so high if there is no processes
> > consuming cpu.
> > Any idea / feedback about this?
> > Thanks.
> >
> > <
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