I descibe our development environment. The setup is not optimal, but it is enough for testing. The production has same effects.
We have a 2-node „master-master“ Icinga setup. One is the configuration master with running Icinga director. After enabling module icingadb on configuration master the load increase from 2.0-5.0 up to 70.0 more.
The icingadb DB runs on configuration master. On both servers the feature icingadb is enabled and configured to use the DB on configuration master. Icingadb on both servers use the local redis.
Icinga has to check many businesses process (more than 300). If I enable the module, I see the checks „waiting or working“ and the database is also working hard.
I think, I have a configuration failure. I don’t know where.