Check_load

[Johan Corsini]

As far as I understand :

In your example, it means that during the last 15 minutes, there was, at a 
said time, 0.53 processes using the cpu to do something, or waiting to be 
allowed to use the cpu.  At this time, the other processes were not doing 
anything, nor waiting to do something.  They were probably in idle mode, 
having really nothing to do...

It is not because a process is in the "top" list that it is either using the 
cpu, or waiting for it. 

If I am wrong, please someone correct me.  But we are indeed beyond the 
context of Nagios, so we should maybe continue this conversation out of the 
list.

Johan

Le Mercredi 10 Mai 2006 17:26, Sandeep Narasimha Murthy a écrit :
> Hi,
>
> So, does load average: 0.35, 0.47, 0.53, mean there are only 0.53 jobs
> running and waiting over the last 15 minutes ? executing TOP in the
> shell shows me atleast 15 different processes..
>
> If at the same time, the CPU Usage is 100%, what does this mean ? 0.53
> jobs is consuming 100% of the CPU ?
>
> It appears, that I am posing questions beyond the context of Nagios so I
> will stop here :) appreciate though any more clarifications..
>
> Regards,
>
> sg
>
> -----Original Message-----
> From: nagios-users-admin at lists.sourceforge.net
> [mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of Tiernan,
> Michael C.
> Sent: quarta-feira, 10 de Maio de 2006 14:43
> To: nagios-users at lists.sourceforge.net
> Subject: RE: [Nagios-users] Check_load
>
> On Behalf Of Derek J. Balling
> 	Sent: Wednesday, May 10, 2006 6:52 AM
> 	To: nagios-users at lists.sourceforge.net
> 	Subject: Re: [Nagios-users] Check_load
>
> > "load average" is the number of processes (average) in the
> > wait state over a given period of time.
>
> Actually, it's the number of processes available to be run, that
> includes those running. (i.e. the Run queue).
>
> A 20 processor machine with one job per processor and each processor
> "running at 100%" is a load of 20 where the same machine, with the same
> 20 jobs running *and* 10 jobs waiting to run has a load of 30.
>
> And as Mr Balling rightfully said, it's averaged over 1min, 5min, 15mins
> by the OS itself.
>
> Now, this is what I've found on Solaris machines and Red Hat Linux
> machines along with the SGI machines I wrangle. It *is* possible that
> some other OS defines it differently.
> (a.k.a. "Never say Never.")


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