Processor Load

[Jamin Cleveland]

That's what I figured.  Thank you for the response.

Ok, so I have a configuration problem here.  I now have 1,100 + hosts being monitored for check-host-alive once per minute.  When I start Nagios, uptime(1) shows that my 1 minute load average rapidly climbs to around 13.  After about 5 minutes, the load settles to around 7.5, but obviously this is still way too high.

I currently only have 1 service setup with the following characteristics:
Template: generic-service
HostName: *
Check Period: *24/7
Notification Interval: 10
Service Notification Options: *Warning Critical Unreachable Recovery
Notification Period: *24x7
Check Command: check-host-alive
Max Check Attempts: *2
Normal Check Interval: 1
Retry Check Interval: *1

As you can see, this service is checked on all hosts (*) by default.

Questions:
[1] Is check-host-alive the best way to go for 1 minute check intervals on 1,100 hosts or should I go with something like fping?
[2] Nagios is compiled with MySQL support and I am using NagMIN.  Could the interaction with the MySQL DB be hindering performance?
[3] Would there be less load on the CPU if I break up my Services by Host Group?  Or should I create Service Groups in NagMIN and use those?

Any suggestions for troubleshooting this problem would be most welcome.

-Jamin


> -----Original Message-----
> From: Fredrik Wänglund [mailto:fredrik.wanglund at mobeon.com]
> Sent: Monday, January 26, 2004 4:29 AM
> To: Jamin Cleveland
> Cc: nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] Processor Load
> 
> A have a PIII 1.4 Ghz with 200 hosts / 600 services. At least 50% of the
> servces is run every minute. My load sits around 4 and the CPU is aound
> 80% idle.
> 
> /FredrikW
> 
> 
> Jamin Cleveland wrote:
> 
> > All,
> >
> > I am configuring Nagios 1.1 to run on a RH 9 box with a Pentium 4 2.5Ghz
> > CPU, and 1GB of RAM.  I will need to monitor up/down status on around
> > 1,000 hosts with roughly 1,500 services.
> >
> > Is this something I can reasonably expect to do on this one machine with
> > a Normal Check Interval of 1 minute?
> >
> > Currently I have 66 hosts setup with 78 services, and my CPU load
> > quickly climbs through the roof.  Is there some sort of throttling I
> > have not configured, or does Nagios just use whatever CPU is available?
> >
> > Thanks in advance for any assistance.
> >
> > -Jamin
> >
> >
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