> Gesendet: Mittwoch, 21. März 2018 um 20:30 Uhr
> Von: "Bernhard Bitsch" <Bernhard.Bitsch(a)gmx.de>
> An: "Matthias Fischer" <matthias.fischer(a)ipfire.org>
> Cc: "IPFire: Development-List" <development(a)lists.ipfire.org>
> Betreff: Aw: Re: [PATCH] vnstat: Update to 1.18
>
> 
> > Gesendet: Mittwoch, 21. März 2018 um 18:38 Uhr
> > Von: "Matthias Fischer" <matthias.fischer(a)ipfire.org> 
> > An: "Michael Tremer" <michael.tremer(a)ipfire.org>, "IPFire: Development-List" <development(a)lists.ipfire.org>
> > Betreff: Re: [PATCH] vnstat: Update to 1.18
> >
> > > 
> > > P.S. I did not appreciate that comment of that forum user about this bug. Bugs
> > > happen. If he doesn't like it, he can take lots of €€€€ into his hand and pay
> > > other people to get their bugs.
> > 
> > Me too. But I tried to be patient, took a deep breath and tried to keep
> > calm and ~professional. Wasn't easy. Besides, I don't think this is
> > really a "bug". 'vnstat' can handle his speed and download rates with no
> > problems. It just happened that they were a bit too much for the
> > standard config - in *his* case.
> > 
> > Best,
> > Matthias
> > 
> > 
> Hi,
> 
> just my opinion ( I've investigated now a bit about this "problem" ;) )
> The "solution" isn't really that. The changed parameter is only used by vnstatd, which isn't used in IPFire. I can't imagine what did the remedy.
> We don't know exactly his configuration. Therefore I gave him some hints to help clarifying the case.
> If he doesn't answer, just forget his unqualified comment.
> 
> Best,
> Bernhard
> 

News about the vnstat problem.
Intensive PMs with Zonediver showed that the effect is caused by 32 bit byte counters of the NIC. ( vnstat reads /proc/net/dev )
He changed the fcrontab period for makegraphs to 3 minutes now. Amount of bytes received in this period is less than 2^32.

Remain two questions: 
- Is this a normal behaviour for the combination of i210-T1 NIC and associated driver or is this specific to his system?
- Can we use the vnstatd daemon? This would allow to increase the vnstat update frequency independent from makegraphs.

I've found a thumb rule for the maximal update period for a given bandwidth. I've documented this in the forum thread.

Best,
Bernhard