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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2325
Location: Sophia-Antipolis, France
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 Posted: Mon Aug 14, 2006 7:41 am Post subject: CPU usage on 2, 4 and 8 way Linux devices |
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Hi all
here are some data & graph templates for multiple CPU Linux devices.
Indeed, Net-SNMP under Linux returns counters whose values range from 0 to (100 x number of logical CPU).
More and more systems use dual core, hyper threading, etc. so the default template which ship with Cacti doesn't work.
To know how many logical CPU are seen by Linux, run this command :
| Code: | $ grep -c ^processor /proc/cpuinfo
2 |
The graph templates do not use the "Auto Scale" functionnality, they are fixed between 0 and 100 percent.
These templates require Cacti 0.8.6h
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cacti_graph_template_ucdnet_cpu_usage_2_way.xml |
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22.56 KB |
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cacti_graph_template_ucdnet_cpu_usage_4_way.xml |
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22.56 KB |
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cacti_graph_template_ucdnet_cpu_usage_8_way.xml |
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alexb
Joined: 29 Nov 2005
Posts: 3
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| Posted: Fri Aug 25, 2006 5:37 pm Post subject: |
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Good stuff...
I think you need to remove maximum value of 100 from data templates for ucd/net - CPU Usage, it can go beyond 100 on SMP systems.
AlexB
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2325
Location: Sophia-Antipolis, France
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| Posted: Wed Aug 30, 2006 4:52 am Post subject: |
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Hi
| alexb wrote: | | I think you need to remove maximum value of 100 from data templates for ucd/net - CPU Usage, it can go beyond 100 on SMP systems. |
that's why I made these templates 
They use CDEF to divide each counter by the number of processors.
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janeller
Joined: 01 Sep 2006
Posts: 1
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| Posted: Fri Sep 01, 2006 2:32 pm Post subject: |
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great job, thank you very much!
before installing your template the processor load from the dualcore cpu has been showed like the scales from top in ssh multiplicated with 2... 
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kamina
Joined: 22 Aug 2006
Posts: 28
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| Posted: Fri Sep 08, 2006 8:32 am Post subject: |
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I added io-wait to these graphs, but they seem disproportionate. Should I also be using the division for them? They seem to correlate with top better when I leave them without division.
edit:
I think I'm mistaken, it does need to be divided
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2325
Location: Sophia-Antipolis, France
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| Posted: Fri Sep 08, 2006 10:15 am Post subject: |
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| I think so.
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kamina
Joined: 22 Aug 2006
Posts: 28
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| Posted: Fri Sep 08, 2006 10:59 am Post subject: |
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| I finally managed to get io-wait which was consistant enough to judge from the averige, it definatly does need to be divided.
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mr_chip
Joined: 18 Sep 2006
Posts: 3
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| Posted: Mon Sep 18, 2006 3:38 pm Post subject: |
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Crap. I applied these templates and now every single graph in my cacti installation is blank.
My RRD's are still updating, the cacti log has nothing since I've done the change, and I'm stumped. Any ideas?
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2325
Location: Sophia-Antipolis, France
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| Posted: Tue Sep 19, 2006 10:56 am Post subject: |
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Hi
did you have any error (like "dependancy not met") when importing the templates ?
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Viper
Joined: 11 Oct 2006
Posts: 3
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| Posted: Wed Oct 11, 2006 8:54 am Post subject: Error... |
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Hello !
I see "Error: XML: Hash version does not exist." when importing the templates .
What the problem ?
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2325
Location: Sophia-Antipolis, France
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| Posted: Wed Oct 11, 2006 9:13 am Post subject: |
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Hi
these templates were exported from Cacti 0.8.6h, so you need at least this version to import them.
What version are you running ?
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Viper
Joined: 11 Oct 2006
Posts: 3
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| Posted: Wed Oct 11, 2006 9:22 am Post subject: |
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| fmangeant wrote: | Hi
these templates were exported from Cacti 0.8.6h, so you need at least this version to import them.
What version are you running ? |
Thaks ! i use Cacti Version 0.8.6c.
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2325
Location: Sophia-Antipolis, France
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| Posted: Wed Oct 11, 2006 9:30 am Post subject: |
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If you have a large Cacti installation, 0.8.6i (released yesterday) is for you 
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Viper
Joined: 11 Oct 2006
Posts: 3
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| Posted: Thu Oct 12, 2006 12:25 am Post subject: |
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| fmangeant wrote: | | If you have a large Cacti installation, 0.8.6i (released yesterday) is for you |
A lot of thanks )
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xpbit
Joined: 29 Sep 2006
Posts: 20
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| Posted: Thu Oct 19, 2006 3:49 pm Post subject: |
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| im not getting any data for the 4 way graph. no errors in the poller either. any ideas? it doesnt say nan just 0.00
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