Hi.. Sorry, I'm bumping that one ; as even after investigating for quite a few days ; I can't figure out how the maximum is calculated in the graph...
2009/12/6 Jean-Yves Avenard <[email protected]>: > Looking at: > http://htpc.avenard.org/power/screen.png > > It shows the maximum as being 2972W ; which is indeed the maximum with > the actual data at the highest resolution. > But it's definitely not the maximum of 5 minutes average as the graph > shows: nothing is over 2200W > I've re-created the RRD with: 100 day of 1 minute average,min,max 5 years of 5 minutes average,min,max 5 years of 30 minutes average,min,max 5 years of 2 hours average,min,max 5 years of daily average,min,max rrdtool create currentcost3.rrd -s 60 \ DS:total:GAUGE:300:0:U \ DS:ch1:GAUGE:300:0:U \ DS:ch2:GAUGE:300:0:U \ DS:ch3:GAUGE:300:0:U \ RRA:AVERAGE:0.5:1:144000 \ RRA:AVERAGE:0.5:5:525600 \ RRA:AVERAGE:0.5:30:87840 \ RRA:AVERAGE:0.5:120:21960 \ RRA:AVERAGE:0.5:1440:1830 \ RRA:MIN:0.5:1:144000 \ RRA:MIN:0.5:5:525600 \ RRA:MIN:0.5:30:87840 \ RRA:MIN:0.5:120:21960 \ RRA:MIN:0.5:1440:1830 \ RRA:MAX:0.5:1:144000 \ RRA:MAX:0.5:5:525600 \ RRA:MAX:0.5:30:87840 \ RRA:MAX:0.5:120:21960 \ RRA:MAX:0.5:1440:1830 > That graph is created with : > > $ret = exec("$RRDTOOL graph $name -l 0 \ > -t '$title' \ > -x $legend \ > --step $res --start e-$start --end $timestamp \ > -w $width -h $height \ > DEF:total=currentcost.rrd:total:AVERAGE DEF:ch2=currentcost.rrd:ch2:AVERAGE \ > DEF:solar=solarprod.rrd:total:AVERAGE DEF:ch1=currentcost.rrd:ch1:AVERAGE \ > DEF:totalmin=currentcost.rrd:total:MIN:reduce=AVERAGE > DEF:ch2min=currentcost.rrd:ch2:MIN:reduce=AVERAGE \ > DEF:solarmin=solarprod.rrd:total:MIN:reduce=AVERAGE > DEF:ch1min=currentcost.rrd:ch1:MIN:reduce=AVERAGE \ > DEF:totalmax=currentcost.rrd:total:MAX:reduce=AVERAGE > DEF:ch2max=currentcost.rrd:ch2:MAX:reduce=AVERAGE \ > DEF:solarmax=solarprod.rrd:total:MAX:reduce=AVERAGE > DEF:ch1max=currentcost.rrd:ch1:MAX:reduce=AVERAGE \ > VDEF:ds0max=ch2max,MAXIMUM \ > VDEF:ds0avg=ch2,AVERAGE \ > VDEF:ds0min=ch2min,MINIMUM \ > VDEF:ds0pct=ch2,95,PERCENT \ > VDEF:ds1max=totalmax,MAXIMUM \ > VDEF:ds1avg=total,AVERAGE \ > VDEF:ds1min=totalmin,MINIMUM \ > VDEF:ds1pct=total,95,PERCENT \ > VDEF:ds2max=ch1max,MAXIMUM \ > VDEF:ds2avg=ch1,AVERAGE \ > VDEF:ds2min=ch1min,MINIMUM \ > VDEF:ds2pct=ch1,95,PERCENT \ > VDEF:ds3max=solarmax,MAXIMUM \ > VDEF:ds3avg=solar,AVERAGE \ > VDEF:ds3min=solarmin,MINIMUM \ > VDEF:ds3pct=solar,95,PERCENT \ > COMMENT:' ' \ > COMMENT:'Maximum ' \ > COMMENT:'Average ' \ > COMMENT:'Minimum ' \ > COMMENT:'95th percentile\l' \ > LINE1:total#000090:'Total ' \ > GPRINT:ds1max:'%5.0lf W ' \ > GPRINT:ds1avg:'%5.0lf W ' \ > GPRINT:ds1min:'%5.0lf W ' \ > GPRINT:ds1pct:' %5.0lf W\l' \ > LINE1:ch1#00FF00:'Pool ' \ > GPRINT:ds2max:'%5.0lf W ' \ > GPRINT:ds2avg:'%5.0lf W ' \ > GPRINT:ds2min:'%5.0lf W ' \ > GPRINT:ds2pct:' %5.0lf W\l' \ > LINE1:solar#FF0000:'Solar ' \ > GPRINT:ds3max:'%5.0lf W ' \ > GPRINT:ds3avg:'%5.0lf W ' \ > GPRINT:ds3min:'%5.0lf W ' \ > GPRINT:ds3pct:' %5.0lf W\l' > > where $res , the argument for --step is 300 (5 minutes) and I do use > the reduce=AVERAGE option. > timestamp is on a multiple of 300 (created in php with: $timestamp = (floor(mktime() / $res) * $res) MAX on the graph still shows up at 2972W ; the graph itself shows the max to be around 2200W. When I use rrdtool fetch ; and check the maximum ; the value is indeed 2170W... So why does graph reports the maximum not of the resolution wanted ; but of the highest level resolution ? (the one that is 1 min average) I've tried with: > DEF:totalmax=currentcost.rrd:total:MAX:reduce=AVERAGE and > DEF:totalmax=currentcost.rrd:total:MAX:step=300:reduce=AVERAGE defining --step or not ; always getting the incorred 2972W. Any help would be appreciated.. Thanks Jean-Yves _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
