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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Let me guess – you’re storing
and displaying just zeros, right?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You need to read up on the difference
between a COUNTER (the default MRTG mode) and a GAUGE.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>A COUNTER is a total count, such as with
network traffic. Here, you want to graph the RATE OF CHANGE of the value.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>A GAUGE is an absolute value. Here,
you want to graph the UNMODIFIED VALUE.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Since a CPU usage is a gauge (IE, it is
not a constantly increasing count, such as with network bytes transmitted) you
need to add the ‘gauge’ option, otherwise you will graph the rate
of change, which will usually be zero. You can think of the CPU usage OID
as a ‘number of seconds CPU time used per second’, IE a rate. Since
it is already a rate, you do not want the default ‘counter’ mode.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Similarly, with a memory value, you will
probably want the ‘gauge’ option.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If (for example) you were monitoring a
count of total pages printed by a printer, then this would be a ‘counter’
and you’d want to see the rate of change instead.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Summary: always add the gauge option,
unless you’re sure the value you are retrieving is a constantly
increasing count rather than a rate.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You probably want to add the ‘noo’
option as well to suppress the second line.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If you’re using routers2 as your
frontend, also add the extended options ‘fixunit’ and ‘nototal’.
It will help the display look better for small values.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Steve<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>Target[cluster1.cpu]:ssCpuRawUser.0&ssCpuRawUser.0:<a
href="mailto:public@172.16.6.183">public@172.16.6.183</a> +
ssCpuRawSystem.0&ssCpuRawSystem.0:<a href="mailto:public@172.16.6.183">public@172.16.6.183</a> +
ssCpuRawNice.0&ssCpuRawNice.0:<a href="mailto:public@172.16.6.183">public@172.16.6.183</a> <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>Title[cluster1.cpu]:
Server CPU Load <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>PageTop[cluster1.cpu]:
<H1>CPU Load For Cluster1- System, User and Nice
Processes</H1> <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>MaxBytes[cluster1.cpu]:
100<o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>ShortLegend[cluster1.cpu]: % <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>YLegend[cluster1.cpu]:
CPU Utilization <o:p></o:p></p>
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<div>
<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>Legend1[cluster1.cpu]:
Current CPU percentage load <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>LegendI[cluster1.cpu]:
Used <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>LegendO[cluster1.cpu]: <o:p></o:p></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span><font
color=red><span style='color:red'>Options[cluster1.cpu]:
growright,nopercent <o:p></o:p></span></font></p>
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<p class=MsoNormal><span class=apple-tab-span><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></span>Unscaled[cluster1.cpu]:
ymwd<o:p></o:p></p>
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<p class=MsoNormal><font size=1 face=STHeiti><span style='font-size:9.0pt;
font-family:STHeiti'><o:p> </o:p></span></font></p>
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