Multi CPU Utilization Graph

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

Its definitely worth looking at, if only for the backup routine..

(it has a nice backup routine included where you download the config to another machine, then if you need to recreate the machine you just boot from the distro disk (takes about 7 minutes) get your system up again and restore the config, nice)...

joshm · Cacti User Joined: 03 Oct 2005 Posts: 62 Location: STL

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

Yup, goto graph management, you will then see an item on the left of the screen:

CDEFs.

(just under Graph Management)

Click on that.

You'll get a list of (surprise, surprise) CDEFS - which are calculations done in a simple way (i.e. terma, termb, operation, termc, operation.... (e.g. a,b,+,c,+,3,/ - give a + b + c all divided by 3.)

So you just need to go into the cdef for "Average All data sources - 4 sources" click on the item and change the 5 for a 4.. Dunno how come its a 5 in your case though...

Argon0

AndyStewart · Posted: Mon Feb 20, 2006 5:14 am Post subject:

Is there a definitive link to a 4 processor template, and instructions for installing?

soz, but im still a real noob at getting cacti working

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

,ang on... here you go:

download file below, goto Cacti console, goto Import a templates. Browse to it. Click Save... et viola. Template and Cdefs installed.

Now how to get it to work...
Assuming it s a windows machine (although it should also work with non-windows servers, as it just uses snmp) and is set up for SNMP already...

First you need to graph the cpus separately: goto Management Devices, choose your device, click on "create graphs for this host", now scroll down... you should see a section marked "Data Query [SNMP - Get Processor Information]" click on the top box to select all processors. Click create at the bottom. You'll be asked for a legend colour, click Create again. Independent graphs will now be available....

leave it for 10 minutes or so, so that Cacti can create the data sources you will need for your multi processor graph....

NOW... Go To Graph Management, choose your device from the drop down list, click add. This will open up "Graph Template Selection [new]" screen here you need to choose the "Multi CPU Utilization on 4 Processor Box v2" template. Click Create.

This opens up a new section: Supplemental Graph Template Data
Here you need to choose your data sources for the graph (these are the individual graphs you created earlier).

For each of the Graph Item Fields you choose the relevant data source:

(e.g. with a server called Server1 you for the first field (Data Source [cpu0] you goto the drop down list and choose the first instance of: Server1 CPU Utilization (cpu), for each subsequent field you choose the next in the list (unfortunately the sources all have the same name! The only way to tell which is which is by there order in the drop down).

Now click Save,, et viola, you should now have a new graph added to the graph management screen - Multi CPU Utilization on Server1, click on this to see it....

<groan> that was more difficult to explain than I thought, let me know if you have any difficulties!

Argon0

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

Ah,there is a caveat to this....

Sometimes when you create the separate graphs it creates sensibly named data sources!!!

So when you go to choose your data sources, instead of just seeing 4 repetitions of : Server1 CPU Utilization (cpu) you MAY see separately named sources thus:

Server1 - CPU Utilization - CPU0 (cpu)
Server1 - CPU Utilization - CPU1 (cpu)
Server1 - CPU Utilization - CPU2 (cpu)
Server1 - CPU Utilization - CPU3 (cpu)

From this you should be able to work out which to assign to which graph item!!!

Argon0

AndyStewart · Posted: Mon Feb 20, 2006 9:04 am Post subject:

one other quick question - im running on 0.8.6g - i guess this is only supported on 0.8.6h?

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

I'm using 0.8.6.h yes... via CactiEZ distro - which is VERY easy to install (just stick a cd in!)...

If you're starting from scratch this is the best way to go...

Otherwise, I don't THINK I'm using anything specific to h, so it SHOULD work...

Argon0

AndyStewart · Posted: Mon Feb 20, 2006 9:19 am Post subject:

yeh, im getting the "hash version" error....currently backing up the g install to do an upgrade (gulp)

AndyStewart · Posted: Mon Feb 20, 2006 9:43 am Post subject:

Bingo - 0.8.6h allows import with no errors...

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

Hope you find it helpful...

I'm just about to publish my first script/graph templates which I've put together for a Virtualisation project - to identify Virtualisation Candidates from out Windows Farm.... If you are interested!

Argon0

AndyStewart · Posted: Mon Feb 20, 2006 9:56 am Post subject:

Almost there....

on the graph management part and i'm picking the 4 cpu entries to be graphed, but i'm getting the following message?

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

Yes that'd be why!!!

I you look at the code you'll see that the rrd's to use are not defined anywhere!

A slight issue may be that I'm running on Linux, you're running on win2k...

But it should work, I'm only using standard Cacti functionality not Linux Specific....

Do you have the graphs of the individual CPUs?

Do you click save after choosing the CPUs?

Argon0

AndyStewart · Posted: Mon Feb 20, 2006 10:42 am Post subject:

yeh, the 4 seperate graphs for the cpu's are fine - got about 3-4 weeks worth of data on them:

Pic 1 - screenshot of Graph Management for the server...

Pic 2 - info on one of the CPU graphs...

Cheers in advance for your help on this btw

argon0 · Cacti User Joined: 12 Mar 2004 Posts: 238

Could you give us a screen print of the Multi CPU screen with the sources selected & graph debug on?

TVM