[hobbit] Help writing test -- sar -- cpu load vs. utilization alerting

[Alan Sparks]

I' ve done this before, although I tend to do the custom extra-script 
solution anymore, since it is more powerful.  However, I've never had a 
problem with a status message or particular color stopping graphing from 
working.  Only obvious idea at the moment is, do you in any way change 
the line structure of the reported values, in such a way that the lines 
would not parse correctly after adding the status message?
-Alan

James Wade wrote:
> If the test turns red, it stops logging data
> even with no status message.
>  
> Henrik, if I have my own test using NCV,
> and the test goes red, is there a reason
> it would stop putting data current NCV data
> in the RRD database?
>  
> Any help would be appreciated, or is there a
> way that hobbit can alert on cpu usage instead
> of cpu load (or both).
>  
> Thanks....James
>
> ------------------------------------------------------------------------
> *From:* James Wade [mailto:jkwade at futurefrontiers.com]
> *Sent:* Thursday, July 10, 2008 10:45 AM
> *To:* hobbit at hswn.dk
> *Subject:* [hobbit] Help writing test -- sar
>
> Hello All,
>  
> I've written my own "sar" test to put sar cpu data
> into the database. It's been working fine now for a while.
> I don't do any alerting, it's just graphing sar data.
>  
> However, a recent problem came up. Hobbit uses cpu load
> for alerting on high cpu load. However, using cpu load doesn't
> take into account i/o wait problems. The cpu may have a low
> load on it, but have excessive i/o wait, so as an example, a
> 24 cpu box, with a load of 12 on it may actually be at 99% utilization.
>  
> I've seen this on database servers where someone writes a
> bad sql query to access the database, or an index file isn't
> there. So I want to alert on cpu utilization in addition to cpu load.
>  
> I want to take my sar test, output is below, that I've written and
> have it check for idle time less than 5% for alerting. I've already
> modified my test for this.
>  
> However, when I was orignally writing the sar test to put into the
> rrd database, if I included any kind of status message, it would not put
> data into the database.
>  
> What's the format so that it keeps putting data into the database
> even if I have a status message? or am I wrong on this?
>  
> Example:
>  
> Here's the output of my sar test now:
>  
> Thu Jul 10 10:35:20  CDT 2008
> usr :  3
> sys : 1
> wio : 1
> idle :  95
>  
> **** GRAPH *****
>
> What I want is something like this if idle is less than 5%:
>
> Thu Jul 10 10:40:30 CDT 2008
> * CPU usage is above 95%
> user : 40
> sys :  10
> wio :   47
> idle : 3
>  
> *** GRAPH ****
>  
> So, if I add to the ouput the CPU usage is above 95%
> will I continue to write to the database the stats?
> Last time I tried adding status messages like above,
> it didn't seem to put anything in the database.
>
> THanks....James
>
>
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