RES: [Perfparse-users] Prune performance fata on graph presentation

[Paulo A. G. F. <pau...@pr...>]

Yves, look at my answers below.

Paulo Afonso Graner Fessel
Administrador de Ambiente e Sistemas UNIX
pau...@pr...
OWT
Fone: +55 (11) 3038-6554
Fax: +55 (11) 3038-6508
http://www.primesys.com.br
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> -----Mensagem original-----
> De: per...@li...=20
> [mailto:per...@li...] Em nome de Yves
> Enviada em: quinta-feira, 16 de dezembro de 2004 10:42
> Para: per...@li...
> Assunto: Re: [Perfparse-users] Prune performance fata on=20
> graph presentation
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> > *	Let the user specify how many data points he wants in order to
> > graph a metric;
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> I will probably work on that soon, but when you have=20
> something like 1500 points in one day, what point will you take ?
> When you draw a graph for a long period, you don't care about=20
> details. What details to remove ? Do you want to see average=20
> values for every day in one month ? The max per day ? The min=20
> ? Draw them all ? Draw other values (std deviation... ) ?

As a physicist by formation, I really understand your worries. But IMO
the solutions are:

* For a monthly graphic, pick up the max, medium and min values for the
day and plot them.
* For a yearly graphic, do the same for monthly values.

> What are the real needs here ?
> We need to think on that.
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> > *	Make PerfParse calculate automatically how many data points are
> > neccessary to make a graph that is both precise and looks good;
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> For short periods, graphs are both precise and look good.

Right.

> For long periods, you don't need precision.

Yes, you don't need too much precision (and thus my suggestion to use
mean values) but you do need graphics that do look good. Don't take me
wrong, but MRTG has been doing this from years! I think it won't byte if
we take a look into MRTG's solutions to make PerfParse code better and
meet end user expectations.

> > *	Allow export of metrics to CSV files, so they can be treated
> > outside of PerfParse using software like LabPlot or OpenOffice=20
> > Spreadsheet.
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> I suggest a tool that does it on the command line. And if=20
> wanted, front-ends of course :)

I think it's better integrate this in PerfParse front-end from the
beginning. IMO, PerfParse's public are not only geeks but also their
managers. ;)

[]'s
Paulo