[PVE-User] Peak load at 7.30AM...

[Eneko Lacunza]

Hi Marco,

If you disable the replica run, does it suffer from high load too?

I think there must be something going on inside the VM...

El 26/4/23 a las 12:48, Marco Gaiarin escribió:
> Situation: a debian stretch mostly 'samba server' for a 150+ clients, in a
> couple of phisical server; VM get replicated between the two server every 30
> minutes.
>
> Very frequently at 7.30 the VM got a high peak rate, becaming mostly
> irresponsive; after fiddling a bit, i've added a watchdog LOAD limit, and
> the VM now reboot.
>
> Looking at logs, it seems caused by the replica of the 7.30:
>
> 	Apr 26 07:30:12 vdmsv1 qemu-ga: info: guest-ping called
> 	Apr 26 07:30:13 vdmsv1 qemu-ga: info: guest-fsfreeze called
>
> and after some (6 to 8 minutes) watchdog reset it:
>
> 	Apr 26 07:36:11 vdmsv1 watchdog[2525]: loadavg 57 33 14 is higher than the given threshold 80 32 16!
> 	Apr 26 07:36:11 vdmsv1 watchdog[2525]: shutting down the system because of error 253 = 'load average too high'
>
>
> Some notes:
>
> 1) the replica run every 30 minutes; no other of the 47 replicas of the day
>    seems sufficient to trigger a reboot.
>
> 2) the phisical server during the high peak seems totally unaffected (no
>    high iodelay, no sensible load/cpu...).
>
> 3) at 7.30 there's no user (they arrive around 8.15).
>
>
> I'm doing some hypotesis; for example debian by default rotate logs at 6.30,
> but looking at file dates logs are completely rotated before the 7.00, so
> the 7.00 replica could have triggered the reboot...
>
>
> Someone have some hint on how can i debug this!?
>
>
> Thanks.
>

Eneko Lacunza
Zuzendari teknikoa | Director técnico
Binovo IT Human Project

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