Processors required for Nagios

[Greg Vickers]

Thanks Brian - actually 900 of these hosts will only have one service check 
running on them - they are Lab PCs that we will be running a check on them 
to see if anyone is logged on or not (they are Win2K pcs). We will have 
20-30 servers that we will be running 10-15 services checks on so we wind 
up with only 1200 to 1300 service checks. In your opinion, will a single 
processor with 512Mb ram be enough? We won't be expanding the number of 
service checks in the foreseeable future.

Greg

At 13:21 27/08/2002, Brian Whitehead wrote:
>If you are going to be monitoring 1000 hosts you are probably looking
>more like 5-10,000+ services.  If you monitor load, ssh, ftp, http,
>zombie process, disk space, that would be 6 services times 1,000 hosts.
>(6,000).  At that rate I would opt for the second processor or a Xeon,
>which emulates two processors in one.  I would also opt for a lot more
>RAM.  RAM is very inexpensive and the more you can keep in memory the
>faster it's going to run and the less drive I/O you'll have.  Just my
>opinion.
>
>
>On Mon, 2002-08-26 at 21:38, Greg Vickers wrote:
> > 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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>--
>Brian Whitehead - A+, LCP, RHCE
>Systems Administrator - Linux Consultant
>Direct: 816.512.9417
>Mobile: 816.215.1598
>mailto:brian at whiteheadconsulting.com
>
>Whitehead Consulting Group
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>http://www.whiteheadconsulting.com

=================================
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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