Count 8GB on PPP in 1 second about vnstat

[vergoh]

Hi,
which version of vnStat is being used and is the daemon or a cron entry active?

[Narga]

I've installet vnstat v1.13 on Arch Linux and running it as systemd daemon:

[Unit]
Description=vnStat network traffic monitor
Documentation=man:vnstatd(1) man:vnstat(1) man:vnstat.conf(5)
After=network.target

[Service]
ExecStart=/usr/sbin/vnstatd -n
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target```

[vergoh]

Good. The version and the daemon shouldn't then be the reason for the problem. Could you run
vnstat --showconfig | egrep '^Band|^Max|Interval'
to show the relevant settings.

[Narga]

Here is mine:

$   vnstat --showconfig | egrep '^Band|^Max|Interval'
BandwidthDetection 1
MaxBandwidth 1000
MaxBWethnone 8
UpdateInterval 30
PollInterval 5
SaveInterval 5
OfflineSaveInterval 30
BandwidthDetectionInterval 5

[vergoh]

Ok. The problem is essentially the combination of those (default) settings. Usually BandwidthDetection would help but it can't be done with PPP interfaces (or at least I don't know how). As a result, vnStat uses the MaxBandwidth value as fallback and that value is far to high for a 3G USB interface. Use some speedtest to determinate what the bandwidth of your connection is in a optimum situation and update the MaxBandwidth value to match that. You may also want to lower UpdateInterval to something like 10. Finally, restart the daemon in order to take new settings into use.

[Narga]

Thanks, I've changed it in /etc/vnstat.conf, hope it work flawlessly.
One more question. How can I edit the database to fix wrong bandwidth in this month.

[vergoh]

Editing the database can be achieved by first exporting the database to a text file using the --exportdb parameter, then fixing the wrong information with any plain text editor (note that there are several lines to update, the format is described on the man page) and finally importing the database back using --importdb. The daemon will need to be stopped during this process.

[Narga]

It's great, I fixed it but I suggest an example in man, --exportdb section, I got a little confusion until I found the example in --importdb section. 😃