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Date:      Fri, 22 Mar 2019 14:55:25 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 236716] net/ntopng: pfSense ntopng Port - Historical graph inaccurate
Message-ID:  <bug-236716-7788-QqGbwlMqhT@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-236716-7788@https.bugs.freebsd.org/bugzilla/>
References:  <bug-236716-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236716

Guido Falsi <madpilot@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|ports-bugs@FreeBSD.org      |madpilot@FreeBSD.org
            Summary|pfSense ntopng Port -       |net/ntopng: pfSense ntopng
                   |Historical graph inaccurate |Port - Historical graph
                   |                            |inaccurate
                 CC|                            |madpilot@FreeBSD.org
             Status|New                         |Open

--- Comment #1 from Guido Falsi <madpilot@FreeBSD.org> ---
I'm taking this as the maintainer of the ntopng port.

I'm not sure though how to address this. It looks like an ntopng problem, s=
ince
the graphs are generated by it.

Does not look like a porting problem but an upstream bug.

I'll try looking at it. Anyway it is important to note that historical data=
 is
actually smoothed out, as you say, so a single peak, or many small peaks wi=
ll
rarely show in the graph. If I remember correctly those graphs are generated
using rrdtool. That tool registers data for timeframes (let's say 5 minutes=
, or
1 day) and for each timeframe registers a minimum a maximum and an average
value. It can well be the graph is drawn using only the averages, while the
other data also uses the min/max values, which then would never show in the
graph.

It could be interesting to test if this happens with a vanilla FreeBSD box =
or a
a Linux box too.

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