[rrd-users] Things not adding up

[Jared Watkins]

I'm working on my first custom rrd project and I'm having an issue with
things not adding up correctly in a stacked graph.

http://farm6.static.flickr.com/5105/5592424900_9a13016d57_b.jpg

I'm most interested in the max values for this data and if you add up all
the individual max values you get a value that's 120.15 greater than the
total printed on the graph both visually and in the gprints.   Here is
another example using only 2 samples:

http://farm6.static.flickr.com/5095/5591833819_9a5942d74a_b.jpg

And the relevant codeŠ

    RRDs::graph "$img/combined-$interval->{label}.png",
        "$interval->{period}", "$interval->{end}",
        "-t DSL Aggerate - $interval->{label}",
        "-h", "$interval->{rezH}", "-w", "$interval->{rezW}",
        "-l 0",
        "-a", "PNG",
        "-v bits/sec",
        "-b", "1000",
        "DEF:er01agas1in=$rrd_dir/er01.yul01.30004.rrd:in:MAX",
        "DEF:er01agas1out=$rrd_dir/er01.yul01.30004.rrd:out:MAX",
        "DEF:er01agas2in=$rrd_dir/er01.yul01.1418299.rrd:in:MAX",
        "DEF:er01agas2out=$rrd_dir/er01.yul01.1418299.rrd:out:MAX",
        "DEF:er01agas3in=$rrd_dir/er01.yul01.1385232.rrd:in:MAX",
        "DEF:er01agas3out=$rrd_dir/er01.yul01.1385232.rrd:out:MAX",
        "DEF:er01agas4in=$rrd_dir/er01.yul01.1819030.rrd:in:MAX",
        "DEF:er01agas4out=$rrd_dir/er01.yul01.1819030.rrd:out:MAX",
        "DEF:er02agas1in=$rrd_dir/er02.yul01.6.rrd:in:MAX",
        "DEF:er02agas1out=$rrd_dir/er02.yul01.6.rrd:out:MAX",

        
"CDEF:totalin=er01agas1in,er01agas2in,er01agas3in,er01agas4in,er02agas1in,+,
+,+,+",

        
"CDEF:totalout=er01agas1out,er01agas2out,er01agas3out,er01agas4out,er02agas1
out,+,+,+,+",

        "LINE1:totalout#000000:Total Out     ",
        "GPRINT:totalout:MAX: Max\\: %5.2lf %S",
        "GPRINT:totalout:AVERAGE: Avg\\: %5.2lf %S",
        "GPRINT:totalout:LAST: Current\\: %5.2lf %Sbits/sec\\n",

The data is being collected every 60 seconds and the rras are setup to keep
7 days worth of 1 minute samples and 3 years worth of daily max values for
long term peak trending.   I can't find any reason these shouldn't be adding
up.. and I'm at a loss as to how to fix it.

Thanks,
Jared



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.oetiker.ch/pipermail/rrd-users/attachments/20110405/a008d178/attachment.htm