Ton posted how to increase the NRPE data load to 16k. But if you use Opsview in a distributed environment (got slaves) you also have to adjust NSCA for large output.
That’s quite easy. Patch and recompile nsca-2.7.2 and change the nsca binary on the master and send_nrpe on the slaves. So the now-up-to-16k check results are sent to, and recieved by, the master. Here’s the NSCA-2.7.2 16k patch containing the necessary changes to common.h.
Now you’re able to plot the Nagios configuration with plot-config.pl to compete with others! And it comes in handy to show it off, search for errors or documentation.
plot-config.pl walks through nagios configuration files and draws depencies between hosts (parent-child) and (optionally) shows the services per host. You can plot the graphviz graph bottom-up or left-right and even neato or circo graphs. Though the output is a colored SVG it’s jut a quick & dirty hack.
Here an example output of plot-config.pl (without services):