7000 services and status.cgi

[Greg Vickers]

Hi all,

I've kludged together a lab monitoring system using Nagios. The lab hosts 
use NSCA to send "I'm available" or "Someone is using me" back to Nagios, 
then a cluster check generates the number of available or unavailable lab 
hosts for use in a cgi which gets called by a jsp which is part of a 
external (to the Nagios server) web site... phew. (Did some regex in JDK 
1.4 so the jsp parses the list of Faculties and iterates across them on a 
campus so I can put a GET statement ?view=kiosk and I've got a kiosk mode 
for display for the PHBs :D - the regex stuff was because of the way the 
jsp site that I had to use was laid out.)

I've recently leaped from 2000 services to 7000 services after adding 5000 
passive service checks from the majority (~1500) of the lab hosts across 
the enterprise. (A lot of these hosts have up to six services per host, 
most only have two services per host.) A couple of users who will remain 
nameless have the status of their hosts (not lab hosts) up on a web page 
24x7, fair enough.
When status.cgi runs, it is using 99% of cpu, and often there are two or 
more instances of status.cgi running so the load is climbing (usually over 
3 when before the lab hosts it rarely got over 1) and the response time of 
the web server is declining.

Apart from putting in Nagios 2.0 (which I know quite a few people are using 
in a production environment, and apparently has better algorithms for 
pulling <blah>.cgi information?), what else could I do to reduce the load?

Thanks,

=================================
Greg Vickers
Computer Systems Officer
Student Support and Systems,
Teaching and Learning Support Systems,
Queensland University of Technology,
Kelvin Grove Campus,
Brisbane,
Australia

CRICOS No 00213J

Ph: 07 3864 3910
Fax: 07 3864 5539
Mob: 0416 001 674 SD: #66147 



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