Problem with scheduling of 5000 checks

[Petrucci, Joseph]

I do not have 5000 hosts, but I have over 5000 services being checked and have not run into this problem. Here is what is different in my scenerio I have 750 hosts with between 1 and 30 services being checked (6123 services) none of my active checks wait more than 5 minutes. All host checks are turned on. My passive checks update every 5 minutes. So is your problem related to the number of hosts? can you try 2500 hosts with 5000 services and see if you get the same problem? I will try this on my dev system and see what happens. 

Also for a large environment have you looked into a Distributed Nagios environment?

>-----Original Message-----
>From: nagios-users-admin at lists.sourceforge.net
>[mailto:nagios-users-admin at lists.sourceforge.net]On Behalf Of Matthias
>Waltsgott
>Sent: Tuesday, June 14, 2005 3:10 PM
>To: nagios-users at lists.sourceforge.net
>Subject: [Nagios-users] Problem with scheduling of 5000 checks
>
>
>Hi all,
>
>to be sure if nagios2 can handle a larger number of checks 
>too, I did some
>tests with sample configurations of 3000 and 5000 services 
>with 1 service
>per host, so also 3000 and 5000 hosts, host checks disabled. 
>
>Everything worked fine with the 3000-services-config. But when 
>I used 5000
>services then some strange things happened. First all the checks were
>pending and nagios scheduled all in the queue correctly. 
>After the first check was performed nagios marked the check 
>with Status OK
>and scheduled it again with normal check interval (in this 
>case 20 min.). 
>These services were never checked again, which means, after 
>checking all
>services the first time nagios stopped checking any services, since all
>lines in the scheduling queue had a next checktime which is in 
>the past. And
>they never get rescheduled until a restart or reload of nagios.
>
>It seems as if nagios simply forget to check these services. No error
>messages in the event or sys log, load < 1, preflight check of 
>the nagios
>without any errors. I used Nagios-2b03, the same situation 
>with Nagios-1.1.
>
>Any idea ? It seems that this behavior only happens if a 
>certain number of
>services are reached. Is there any kind of limit for services 
>or something
>like this?
>
>It would be great if you could help me, since I want to use nagios in a
>larger environment, but with this situation I can't.
>
>Thanks in advance.
>
>Regards from Germany,
>Matthias Waltsgott
>
>
>
>
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::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null