[rrd-users] TOTAL function over small time periods

Chris Picton chrisp at tangent.co.za
Thu Sep 15 14:47:23 MEST 2005

Hi all

I have a data source where I am incrementing a COUNTER rrd by one
whenever an event occurs.

I want to plot a graph of number of occurrences per

I had thought that the TOTAL function would be of help here, but am
having problems.

My command looks like:

rrdtool graph file.png -a PNG -w 512 -h 128 \
 -s "1125525600" -e "1128117600" \
 -x "DAY:1:WEEK:1:WEEK:1:86400:%d %b" \
 -v "events" -l 0 \
 "DEF:e0=file.rrd:event:AVERAGE:start=1125525600+0d:end=1125525600+1d" \
 "VDEF:t0=e0,TOTAL" \
 "LINE:t0#FF0000" \
 "DEF:e1=file.rrd:event:AVERAGE:start=1125525600+1d:end=1125525600+2d" \
 "VDEF:t1=e1,TOTAL" \
 "LINE:t1#FF0000" \ 
 "DEF:e2=file.rrd:event:AVERAGE:start=1125525600+2d:end=1125525600+3d" \
 "VDEF:t2=e2,TOTAL" \
 "LINE:t2#FF0000" \ 
 "DEF:e3=file.rrd:event:AVERAGE:start=1125525600+3d:end=1125525600+4d" \
 "VDEF:t3=e3,TOTAL" \
 "LINE:t0#FF0000" \ 
 etc etc

However, each timeslice is not being shown separately - I am getting 30
horizontal lines across the entire graph as opposed to just during the
relevant time period.

If there is a better way of doing what I want to do (display number of
event per (variable sized) time period), please let me know.
Alternatively, is there something wrong with my graph command above?



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