Ugly Graphs: Leveled one moment, spikey the next [resolved]

[radicand]

I've got a really strange issue that keeps happening- sometimes one of my graphs will have flat peaks, and then in the next 5 minute interval, it will have spikey peaks (desired).

I'm using 0.8.6h and RRDTool 1.2.6. Any help or suggestions would be appreciated regarding how to eliminate the flat graphs from appearing on occasion.

FLAT


SPIKE

[BSOD2600]

Hmm, you have rrdtool 1.2 selected in settings?

[radicand]

Hmm, you have rrdtool 1.2 selected in settings?

I do.

[gandalf]

I suppose the first graph spans some time in the past, so you see the consolidation effect. Whereas the second graph is younger in time. Please report the timespan for both ...
Reinhard

[radicand]

They are both the same graph. I screenshotted the first, waited 5 minutes, and then screenshotted it again when it returned to normal. Same 12h period for both.

[gandalf]

Please try to recreate this effect form Graph Management, using DEBUG mode and save the shown rrdtool graph statement for the flat one.
If possible, please upgrade to latest rrdtool, as 1.2.6 is know to have severe errors
Reinhard

[radicand]

I'll update RRDTool and see if that helps.

Flat Graph

Code: Select all

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="Miharu - Bit Traffic - eth0" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bits per second" \
--slope-mode \
DEF:a="/var/www/localhost/htdocs/cacti/rra/miharu_traffic_in_189.rrd":traffic_in:AVERAGE \
DEF:b="/var/www/localhost/htdocs/cacti/rra/miharu_traffic_in_188.rrd":traffic_out:AVERAGE \
CDEF:cdefa=a,8,* \
CDEF:cdefe=b,8,* \
CDEF:cdefba=TIME,1150932470,GT,a,a,UN,0,a,IF,IF,TIME,1150932470,GT,b,b,UN,0,b,IF,IF,+ \
AREA:cdefa#00CF00:"Inbound"  \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s"  \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n"  \
LINE1:cdefe#002A97:"Outbound"  \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s"  \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s\n"  \
COMMENT:"\n"  \
HRULE:11034004.94#FF0000:"95th Percentile"  \
COMMENT:"(11.03 mbit in+out)" 

Proper Graph

Code: Select all

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="Miharu - Bit Traffic - eth0" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bits per second" \
--slope-mode \
DEF:a="/var/www/localhost/htdocs/cacti/rra/miharu_traffic_in_189.rrd":traffic_in:AVERAGE \
DEF:b="/var/www/localhost/htdocs/cacti/rra/miharu_traffic_in_188.rrd":traffic_out:AVERAGE \
CDEF:cdefa=a,8,* \
CDEF:cdefe=b,8,* \
CDEF:cdefba=TIME,1150932685,GT,a,a,UN,0,a,IF,IF,TIME,1150932685,GT,b,b,UN,0,b,IF,IF,+ \
AREA:cdefa#00CF00:"Inbound"  \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s"  \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n"  \
LINE1:cdefe#002A97:"Outbound"  \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s"  \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s\n"  \
COMMENT:"\n"  \
HRULE:12391318.8#FF0000:"95th Percentile"  \
COMMENT:"(12.39 mbit in+out)" 

I was able to get another flat, wait a few minutes and then get the proper graph again.

[radicand]

Upgrading the RRDTool version seems to have fixed the problem entirely. Thanks for the suggestion!