[rrd-users] Re: Graphing

Christohper Pope cpope at sell.com
Thu Jan 3 20:12:09 MET 2002


Thank you for the reply.

In that case, do I even need the CF AVERAGE?

couldn't I just
rrdtool create user.rdd \
	DS:signin:GAUGE:600:0:U

fill it with data and
rrdtool graph users.png \
	DEF:signin=user.rrd:signin:<nothing here> 
	AREA:signin:#123456:"Sign-in"
	.
	.
	.

Or am I way off-base here?

Thanks
Chris Pope

On Thu, 3 Jan 2002 08:38:02 -1000
Clifton Royston <cliftonr at lava.net> wrote:

> 
> On Thu, Jan 03, 2002 at 12:42:19PM -0600, Christohper Pope wrote:
> > Say this returns something like 35 users the first time, and 40 users
> > the second time.
> > 
> > I issue an update into the users.rrd w/the following create definition:
> > rrdtool create --start `date +%s` user.rrd \
> >   	DS:signin:GAUGE:600:0:U \
> >    	RRA:AVERAGE:0.5:1:288 \
> >     	RRA:AVERAGE:0.5:3:1680 \
> > 	RRA:AVERAGE:0.5:6:1440 \
> > 	RRA:AVERAGE:0.5:288:365 
> > 
> > Graphing this, the results are in signins per second and i get
> > something like (40 - 35)/(300 secs).
> 
> Something's wrong right there, because with a Gauge (think
> "thermometer") time rates do not get stored or computed for the graph;
> just the values that got stored.
> 
> The calculation you describe is what would happen for COUNTER or DERIVE
> types, but shouldn't happen for a gauge.  
> 

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