Question about Load Average graph

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cousinscuzzy
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Joined: Tue Jan 30, 2007 3:32 pm

Question about Load Average graph

Post by cousinscuzzy »

I'm curious why the default "ucd/net - Load Average" graph template uses stacked 1, 5, and 15 minute averages along with a total. It seems to me that totaling the averages from these different periods doesn't give any meaningful information. Am I missing something?
cousinscuzzy
Posts: 11
Joined: Tue Jan 30, 2007 3:32 pm

Post by cousinscuzzy »

Also they're actually 1, 5, and 10 minute load averages according to /usr/share/snmp/mibs/UCD-SNMP-MIB.txt. I think the default labeling is wrong.
cousinscuzzy
Posts: 11
Joined: Tue Jan 30, 2007 3:32 pm

Post by cousinscuzzy »

Can anyone confirm that I'm right about these things? Or point out my mistakes?

It might be that the default graph templates are only there as examples and not meant to be used without modification but I find this a bit misleading to Cacti/SNMP newbies like me.
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gandalf
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Re: Question about Load Average graph

Post by gandalf »

cousinscuzzy wrote:I'm curious why the default "ucd/net - Load Average" graph template uses stacked 1, 5, and 15 minute averages along with a total. It seems to me that totaling the averages from these different periods doesn't give any meaningful information. Am I missing something?
You did not miss anything. It simply looks nicer :wink:
Reinhard
cousinscuzzy
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Joined: Tue Jan 30, 2007 3:32 pm

Post by cousinscuzzy »

Thanks, Reinhard. What about the 10 vs 15 minute issue?

BTW, I really appreciate all the support you provide in these forums.
Tiago Cruz
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Joined: Wed Sep 19, 2007 9:00 am

Re: Question about Load Average graph

Post by Tiago Cruz »

gandalf wrote:
cousinscuzzy wrote:I'm curious why the default "ucd/net - Load Average" graph template uses stacked 1, 5, and 15 minute averages along with a total. It seems to me that totaling the averages from these different periods doesn't give any meaningful information. Am I missing something?
You did not miss anything. It simply looks nicer :wink:
Reinhard
Reinhard,

Please, help me to understand how can I calculate the "real" load average of machine...

I'm seeing on machine: load average: 1.56, 2.81, 3.32

And my graph is going to "0" until "10" now.

Sounds like the graph is the sum of all load, it's correctly?

Thanks!
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Load Average
Load Average
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Tiago Cruz
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Post by Tiago Cruz »

Sorry by double-post, but I've found one better example :-)

Current load average: 0.67, 0.65, 0.61

And the picture show almost 2.0 of load... 8-)
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load.png
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gandalf
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Post by gandalf »

Simply change the AREA/STACK/STACK representation into thre LINE1's instead. That's all. It's simply a wrong graph representation of the numbers
Reinhard
Tiago Cruz
Posts: 7
Joined: Wed Sep 19, 2007 9:00 am

Post by Tiago Cruz »

gandalf wrote:Simply change the AREA/STACK/STACK representation into thre LINE1's instead. That's all. It's simply a wrong graph representation of the numbers
Reinhard
Thanks!

I've changed to:

Code: Select all

#1: AREA / AVERAGE
#2: GPRINT / LAST
#3: AREA / AVERAGE
#4: GPRINT / LAST
#5: AREA / AVERAGE
#6: GPRINT / LAST
#7: GPRINT / AVERAGE
And my boss stop to kill me :-)

Thanks!
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