^ This. I really don't understand how people claim that nagios can't scale.

k3oni · on March 4, 2014

It can't scale when we are talking 10000's of checks, triggers and hosts.

This is why we moved to Zabbix:

Number of items monitored: 77342 Number of triggers enabled: 25405

Try and scale Nagios to those values and let me know how it works. We tried and we let it go a few years ago.

dbenhur · on March 4, 2014

5000 checks and a few hundred hosts is a fairly tiny operation. At an order of magnitude above that you will start feeling real pain with Nagios.

madaxe_again · on March 4, 2014

Yup, never claimed anything but - but it's big enough that automation is essential, lest you descend into some variety of lovecraftian horror-scape.