[rrd-users] weird big spike

[Neil]

Hey guys, 
I'm wondering why I am get a huge spike greater than 100 while my machine 
doesn't really have load. I am doing a check on my cpu(load1, load5 and 
load15). This check returns a value in percent. I "rrdtool fetch" and look 
at the data but I didn't see any number greater than 100. I have also 
attached the image so you can check. I have also added the commands I used 
for the database and graph generation. 

# command I used to create the cpuload
rrdtool create cpuload_on_dbsn202.rrd -s 60 \
       DS:load1:GAUGE:600:0:U \
       DS:load5:GAUGE:600:0:U \
       DS:load15:GAUGE:600:0:U \
       RRA:AVERAGE:0.5:1:483840 \
       RRA:MIN:0.5:1440:1 \
       RRA:MAX:0.5:1440:1 \
       RRA:MIN:0.5:10080:1 \
       RRA:MAX:0.5:10080:1 \
       RRA:MIN:0.5:40320:1 \
       RRA:MAX:0.5:40320:1 \
       RRA:MIN:0.5:483840:1  \
       RRA:MAX:0.5:483840:1 

# command I use to update the rrd database
/usr/local/bin/rrdtool update /usr/local/nagios/rrd/cpuload_on_dbsn202.rrd 
1079976987:2:1:1 

#command I use to generate the image
/usr/local/bin/rrdtool graph cpuload.png -s $NOW-86400 -e $NOW -a PNG \
       -t "CPU load for dbsn202" -w 495 -h 160 \
       -l 0 -u 100 -r --units-exponent 0 \
       COMMENT:"CPU Utilization (%)\n" \
       DEF:load1var=cpuload_on_dbsn202.rrd:load1:AVERAGE 
LINE1:load1var#990099:"1 minute" COMMENT:"\n" \
       DEF:load5var=cpuload_on_dbsn202.rrd:load5:AVERAGE 
STACK:load5var#cc33ff:"5 minutes" COMMENT:"\n" \
       DEF:load15var1=cpuload_on_dbsn202.rrd:load15:AVERAGE 
AREA:load15var1#00AAFF:"15 minutes" COMMENT:"\n" \
       DEF:load15var=cpuload_on_dbsn202.rrdload15:AVERAGE 
LINE1:load15var#000000:""
       COMMENT:"\n" \
       COMMENT:"$NOW\n" 

Is there something wrong with the commands I executed? 

Thanks in advance. 

Ronneil 



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-- URL : http://www.ee.ethz.ch/~slist/p/dbsn202_cpu_load_last_day.png


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