Processors required for Nagios

[Greg Vickers]

Hey all, I included the below to ask the correspondents:

What kind of processor are you running this system on and how do you find 
the processor utilization on this server? I ask because I am in the middle 
of sourcing a server for our section and are looking at a single processor 
P3 1.4 GHz with 512Mb ram (and RAID5 3*18Gb 10k rpm + hot swap etc etc *G*).

We will be monitoring up to 1000 hosts and a bucket load (I guess 
1500-2000) of services. (I actually hadn't thought about how many 
hosts/services we would be monitoring!) So for that kind of load, is a 
second processor warranted?

Thanks all,
Greg

p.s. just read through the tuning doc

 > am currently watching about 300 hosts with approaching 600 service
>There are some performance tuning options that you can apply.  This
>helped my memory out greatly.  I'm not 100% sure of the ramifications,
>but I haven't seen any ill effects from the first one.
>
>Apache defaults to 8 daemons running.  I changed this to 2 at work and 1
>at home and gained a large amount of memory back.
>
>You can also scale nagios to only run X number of checks at a time.
>Depending on your configuration and how often the checks occur, you can
>have nagios only perform 50 checks at a time for example.
>
>http://nagios.sourceforge.net/docs/1_0/tuning.html
>Check #3 on the list for info on deciding how to scale your checks back.
>
>Hope this helps....
>
>Andy
>
>-----Original Message-----
>From: nagios-users-admin at lists.sourceforge.net
>[mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of Rusch,
>Daniel
>Sent: Monday, August 26, 2002 9:34 AM
>To: 'Terry Simons'; Timo Koskela
>Cc: nagios-users at lists.sourceforge.net
>Subject: SPAM - RE: [Nagios-users] Nagios is running multiple daemons
>
>I posted a similar message a week or so ago and didn't get any response.
>On
>my system the number of processes running that are owned by nagios
>varies
>from a half dozen to over 100.  I assume that nagios is running
>multithreaded and spawning of sub-processes.  I have noticed that nagios
>will burry the box it is running on and then of course the number of
>processes owned by nagios increases dramatically as they pile up.  Check
>to
>see if nagios is over loading your system.  I logged uptime and ps -few
>|
>grep nagios | wc -l every five minutes.
>
>I posted my message to see what a "normal" number of processes should
>be,
>but received no replies.
>
>Dan
>
>-----Original Message-----
>From: Terry Simons [mailto:galimore at mac.com]
>Sent: Monday, August 26, 2002 7:13 AM
>To: Timo Koskela
>Cc: nagios-users at lists.sourceforge.net
>Subject: Re: [Nagios-users] Nagios is running multiple daemons
>
>
>I don't know the reason, but I have seen multiple copies of Nagios
>running.
>
>I haven't seen more than two, but it wasn't a parent/child
>relationship... there were actually two copies of Nagios running...
>
>I thought that maybe it had something to do with the way that Nagios
>parallelizes checks, but maybe not...
>
>Ethan?
>
>- Terry
>
>
>On Sunday, August 25, 2002, at 11:59  PM, Timo Koskela wrote:
>
> > Hi all,
> >
> > Has somebody had same problem as I with Nagios. If there is something
> > wrong in our LAN where nagios is running, or in firewall, example line
>
> > is cut to outer world Nagios start to run multiple daemons. Like
>couple
> > days ago when i checked there was about 20 copies of Nagios, and it
> > didin't work so well then, but when i killed the main pid, they all
> > died. Please let me know if you know the reason...
> >
> > Timo
> > Finland
> >
>Missing every moment and preparing for the next.
>
>
>
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=================================
Greg Vickers
Computer Systems Officer
Student Support and Systems
Teaching and Learning Support Systems, QUT
g.vickers at qut.edu.au
Ph: 07 3864 8276 Fax: 07 3864 5425
Mob: 0416 001 674 SD: 6147



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