[Orca-users] Re: About how to make PNG

Blair Zajac blair at orcaware.com
Mon Jan 21 18:12:10 PST 2002

"Keiko.Y" wrote:
> Hi, Blair
> I write again, sooner than I expected (^^ゞ
> Well, today I want to know how orca make PNGs.
> I saw orcallator.cfg, and there were lots of list that
> seemed to related with making PNG;
> >plot {
> >title                   %g Average # Processes in Run Queue (Load Average)
> >source                  orcallator
> >data                    1runq
> >data                    5runq
> >data                    15runq
> >legend                  1 minute average
> >legend                  5 minute average
> >legend                  15 minute average
> >y_legend                Number Processes
> >data_min                0
> >data_max                1000
> >href
> http://www.orcaware.com/orca/docs/orcallator.html#processes_i
> >n_run_queue
> >}
> Now, I can see all data in the graphs, I mean the axis is adjusted well.
> I wonder the axis-setting always be nice by orca, or sometimes it should be
> done
> by myself? (This case the data aren't percentage ones.)
> If I should do, how I can do that??

It depends on the type of data.  If you have measurements that may be
incorrect and you don't want them to end up in the RRD files, then you
use the data_min and data_max to have RRD ignore them.  The data_min and
data_max are used only once to create the RRD file.  After this, changing
them won't make a difference and you'll have to modify the RRD files using
a separate program.

If you want to limit the min and max of a plot, then use the plot_min and
plot_max.  People use this if you always want a range, say 0 to 100, even
though the data may be in a smaller range (say 10-25).


> Thank you all the way.
> Sincerely
> Keiko. Y

Blair Zajac <blair at orcaware.com>
Web and OS performance plots - http://www.orcaware.com/orca/

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