[rrd-users] Maximum values problem.

[Antkiewicz, Marcin]

 <<hour.png>>  <<min.png>> Hello,
I use RRD to store data gathered from 6am-8pm with 60 sec. resolution. 

When a graph is made for a day woth of data, with  MAXIMUM function, 
with step = 60 sec, evertyhing is fine. (see: min.png)
But, if I want simmilar graph, for MAXIMUM, with step = 60,  but  made with
hourly maximums, I loose all spikes (it looks like an average of the
maximums 
for that period, sample picts attached).
(see: hour.png)

That is a problem as I need weekly pictures, created from hourly data,
which show the same problem. 

Code framents enclosed:

RRDs::create("$database_name",
"--start",$start-1,
"--step","60",
"DS:queue:GAUGE:600:U:U",
"DS:idle:GAUGE:600:U:U", 
"DS:proc:GAUGE:600:U:U",
"RRA:MAX:0.5:1:44640", 
);


RRDs::create("$database_name",
"--start",$start-1,
"--step","60",
"DS:queue:GAUGE:600:U:U",
"DS:idle:GAUGE:600:U:U", 
"DS:proc:GAUGE:600:U:U",
"RRA:MAX:0.5:60:774", 
);


RRDs::graph("$node-$mon-$day-$yrs.png", 
"--imgformat",   "PNG", 
"--title",       "$node on $mon-$day-$yrs",  
"--start",       "$morning", 
"--end",         "$evening", 
"--upper-limit", "100",
"--lower-limit", "0", 
"--base",        "1024", 
"DEF:queuedata=$database_name:queue:MAX",
"DEF:idledata=$database_name:idle:MAX", 
"DEF:procdata=$database_name:proc:MAX",
"CDEF:proc=procdata,10,/",
"CDEF:idle=200,idledata,2,-,/",
"LINE2:queuedata#$red:Cpu Queue", 
"LINE2:idle#$gray:CPU Utilization",
"LINE2:proc#$blue:Processes/10",
);

Thank You,

Marcin Antkiewicz
mantki3 at uillinois.edu


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