[rrd-users] Is there a setting to smoothen a graph?

[Marc MERLIN]

On Sat, Jul 17, 2010 at 11:07:33PM -0700, Marc MERLIN wrote:
> Let's take this
> http://graphs.merlins.org/graphs/g.php?action=zoom&local_graph_id=70&rra_id=6&view_type=&graph_start=1279409518&graph_end=1279409978&graph_height=240&graph_width=800&title_font_size=12
> 
> as a zoom of
> http://graphs.merlins.org/graphs/g.php?action=zoom&local_graph_id=70&rra_id=6&view_type=&graph_start=1279380998&graph_end=1279438498&graph_height=240&graph_width=800&title_font_size=12
> 
> My problem is that I'd like 10 seconds updates to catch transient
> electricity changes, but at a 10 second update rate, during 10 seconds, my
> counter can oscilate between 5 and 6Wh per time slice, causing the ugly
> stair effect.
 
The "setting" was simply that my data source didn't have enough significant
digits.

I fixed that, and now things are ok :)

Marc

> I have cacti configured to generate the graph with this command:
> /usr/bin/rrdtool graph - \
> --imgformat=PNG \
> --start=-86400 \
> --end=-50 \
> --title="ECM House PV" \
> --base=1000 \
> --height=240 \
> --width=800 \
> --alt-autoscale \
> --vertical-label="Wh" \
> --slope-mode \
> --font TITLE:12: \
> --font AXIS:8: \
> --font LEGEND:10: \
> --font UNIT:8: \
> DEF:a="/var/lib/cacti/rra/houseecm1_25.rrd":PV:AVERAGE \
> CDEF:cdefa=a,3600,* \
> AREA:cdefa#0000FFFF:"Power"  \
> GPRINT:cdefa:LAST:"             Current\:%8.0lf Wh"  \
> GPRINT:cdefa:AVERAGE:"Average\:%8.0lf Wh"  \
> GPRINT:cdefa:MIN:"Minimum%8.0lf Wh"  \
> GPRINT:cdefa:MAX:"Maximum\:%8.0lf Wh\n" 
> 
> Are there other settings I can use, or am I out of luck if I don't have
> higher solution counters?
> 
> Thanks,
> Marc
> -- 
> "A mouse is a device used to point at the xterm you want to type in" - A.S.R.
> Microsoft is to operating systems & security ....
>                                       .... what McDonalds is to gourmet cooking
> Home page: http://marc.merlins.org/  
> 
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-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/