[rrd-users] Re: Graphing CPU values < 1 (wierd graphs)

[Steve Smith]

Hi,

I posted the question below to the list and was helped with a solution 
that I wanted to pass along to others.  The change makes it possible 
produce  unscaled graphs on a per target basis, by passing the 
--units-exponent=0 parameter to rrdgraph..

MRTG_lib.pm needs to have the new keyword added ("noscale"), and then 
similar modifications are made to mrtg-rrd, 14all, or what ever you use 
to produce the graphs.  This assumes MRTG 2-10.5, and mrtg-rrd 0.7.

To invoke it , simply use the keyword 'noscale' on the Options line of  
your mrtg.cfg, e.g.,

Title[r2-load-stat]: 1 Minute: Load Ave
PageTop[r2-load-stat]: <H1> Load Average</H1>
Options[r2-load-stat]: gauge,nopercent,noo,noscale
LegendI[r2-load-stat]: Load
LegendO[r2-load-stat]:
YLegend[r2-load-stat]: Load Ave
ShortLegend[r2-load-stat]:
Legend1[r2-load-stat]: One Minute Load Average
Legend2[r2-load-stat]:
Target[r2-load-stat]: OID:comm at target

Here are the diffs:

*** MRTG_lib.pm Wed Nov  5 14:56:39 2003
--- /usr/local/src/mrtg-2.10.5/lib/mrtg2/MRTG_lib.pm    Fri Oct  3 
05:21:27 2003
***************
*** 560,566 ****
      my(@known_options) = qw(growright bits noinfo absolute gauge 
nopercent avgpeak
                            integer perhour perminute transparent 
dorelpercent
                            unknaszero withzeroes noborder noarrow noi noo
!                           nobanner nolegend pngdate printrouter noscale);

      snmpmapOID('hrSystemUptime' => '1.3.6.1.2.1.25.1.1');

--- 560,566 ----
      my(@known_options) = qw(growright bits noinfo absolute gauge 
nopercent avgpeak
                            integer perhour perminute transparent 
dorelpercent
                            unknaszero withzeroes noborder noarrow noi noo
!                           nobanner nolegend pngdate printrouter);

      snmpmapOID('hrSystemUptime' => '1.3.6.1.2.1.25.1.1');

=======================================
And for mrtg-rrd:

*** /usr/local/src/mrtg-rrd-0.7/mrtg-rrd.cgi    Thu Oct  9 22:09:11 2003
--- mrtg-rrd.cgi        Thu Nov  6 11:27:02 2003
***************
*** 542,547 ****
--- 543,552 ----
                'MGRID#000000', '-c', 'FRAME#000000',
                '-g', '-l', '0';

+       if (defined $target->{options}{noscale}) {
+               push @args, "--units-exponent", 0;
+       }
+
        $target->{background} = '#f5f5f5'
                unless defined $target->{background};

Thanks to Serge Maandag who sent me in the right direction.

-Steve


Steve Smith wrote:

>
> Hi,
>
> I am trying to plot a fractional value (string) for the 1 minute CPU 
> load of a host using the configuration below. However, the graph comes 
> up with "200 m" and "400 m" for the Y-axis labels, when the value < 
> 1.  The values on LegendI are correct and compare with the snmpget 
> values. So things are working, except for the Y-axis labels.
>
> Can someone tell me what I am doing wrong?  I am using mrtg 2.10.5, 
> rrdtool  1.0.45, and the mrtg-rrd and 14all cgi's.
>
> Title[r2-load2-stat]:  Load Ave
> PageTop[r2-load2-stat]: <H1>Load Average</H1>
> Options[r2-load2-stat]: gauge,nopercent,noo,unknaszero
> LegendI[r2-load2-stat]: Load
> LegendO[r2-load2-stat]:
> YLegend[r2-load2-stat]: Load Ave
> ShortLegend[r2-load2-stat]:
> Legend1[r2-load2-stat]: One Minute Load Average
> Legend2[r2-load2-stat]:
> Target[r2-load2-stat]:.1.3.6.1.4.1.2021.10.1.3.1&.1.3.6.1.4.1.2021.10.1.3.1:commstr at host.domain 
>
>
> Thanks,
>    -Steve
>

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