[rrd-users] Re: Weird #'s from basic rrdgraph

[Clarence]

Question..

    But I'm not graphing the "MAX" I'm graphing the "AVERAGE".

I thought if I had a dataset like this:

    3    ,    5    ,    3    ,    3    ,    3    ,    3    ,    3    ,    3
,    3    ,    3

The graph should look like this:

  #
  #
# # # # # # # # # # #
# # # # # # # # # # #
# # # # # # # # # # #

    and the GPRINT  stuff should display this:
    MAX = 5  , MIN=3


Whats happening to me is the second datapoint (5) is getting decreased to ,
lets say 4. Now the graph looks like this:


  #
# # # # # # # # # # #
# # # # # # # # # # #
# # # # # # # # # # #

    and the GPRINT stuff says:
    MAX=4 ,  MIN=3
***** But the rrdfetch for the same time frame display the coorect values:

    3    ,    5    ,    3    ,    3    ,    3    ,    3    ,    3    ,    3
,    3    ,    3


Thanks!!

I hope you use fixed width fonts!

I just dont understand why if I printed 140 pages in one hour and cant
disply that.
Or
Why cant I display what rrdfetch returns. rrdtool seems to know that the
actual datapoint
for the day in question was 140. Why not graph it?

Clarence Hart



----- Original Message -----
From: "Tobias Oetiker" <oetiker at ee.ethz.ch>
To: "Clarence Hart" <rti1clh at ismd.ups.com>
Cc: <rrd-users at list.ee.ethz.ch>
Sent: Saturday, March 17, 2001 5:38 AM
Subject: [rrd-users] Re: Weird #'s from basic rrdgraph


>
> Yesterday Clarence Hart wrote:
>
>  |
>  |
>  | Hey all,
>  |
>  | I have a quick question.  Heres the senerio:
>  | Note: Im graphing  how many pages printed per/half hour from HP
>  |       printers.
>  |
>  | I create an rrd (filename 1.rrd).
>  | I use perl's " use RRDs; " command to a create the graph.
>  |
>  |
>  |
>  |         Why do I get different values when I make my start and end
times
>  |         over aprox 13days?
>  |          -> If I choose to graph 5 days the max value would be 140
pages.
>  |          -> If I choose to graph 20 days the max value would change to
~70
>  | pages.
>  |
>  |          Why does this happen?
>
> if you are graphing averages and print the MAX of these averages,
> then obviously the averages will even out the lower a resolution
> you choose and the max will go down accordingly
>
> tobi
>  |
>  |
>  |          ---------------Heres my create and graph
script.------------------
>  |
>  |          $time equals the first time in the file.
>  |          RRDs::create("/tmp/1.rrd", "--start", "$time-1", "--step",
"1800",
>  |         "DS:value:COUNTER:2100:U:U",
>  |
"RRA:AVERAGE:0.5:1:35040","RRA:MAX:0.5:1:35040","RRA:MIN:0.5:1:35040");
>  |
>  | ----------------Heres how I create the graph-----------------------
>  |
>  | @options=("-l 0","-s $starttime","-e $endtime",
>  |                   "-v pages per half hour",
>  |                   "-cCANVAS#F5FFFA","-cGRID#D2B48C",
>  |                   "-h $height","-w $width",
>  |                   "-u 25","-aGIF",
>  |                   "-t $title $currenttime");
>  |         @DEF=();
>  |         @PLOT=();
>  |         @LEGEND=();
>  |
>  |         $newstr="DEF:${i}A=$foobar:value:AVERAGE";
>  |          push(@DEF,$newstr,
>  |             "CDEF:${i}${oida}=${i}A,1800,*",
>  |             "LINE2:${i}${oida}$colors{$i}:$oida \: ","COMMENT: \t ",
>  |                  "COMMENT:      $printerdevices{$databasename} - AVG",
>  |                  "GPRINT:${i}${oida}:AVERAGE:%4.0lf",
>  |                  "COMMENT:MAX",
>  |                  "GPRINT:${i}${oida}:MAX:%4.0lf",
>  |                  "COMMENT:MIN",
>  |                  "GPRINT:${i}${oida}:MIN:%4.0lf",
>  |                  "COMMENT:LAST",
>  |                  "GPRINT:${i}${oida}:LAST:%4.0lf\\n");
>  |
>  | push(@LEGEND,
>  |            "HRULE:$FIXED#FF0590:Base Line $FIXEDLABEL pages",
>  |            "HRULE:-$FIXED#FF0590:",
>  |            "HRULE:0#000000:");
>  |
>  | $fileOutFinal="/tmp/file.gif";
>  |         RRDs::graph(( -w $fileOutFinal)? $fileOutFinal : $fileOutFinal
,
>  |                 @options,
>  |                 @DEF, at PLOT, at LEGEND);
>  |
>  | ------------------------------------------------------------------
>  |
>  |
>  | Thanks
>  |
>  |
>  | Clarence Hart
>  | UPS
>  | Office: 410-560-4182
>  | Fax:    410-560-4329
>  | chart at ups.com
>  |
>  |
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>
> --
>  ______    __   _
> /_  __/_  / /  (_) Oetiker, Timelord & SysMgr @ EE-Dept ETH-Zurich
>  / // _ \/ _ \/ / TEL: +41(0)1-6325286  FAX:...1517  ICQ: 10419518
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