Hi Everyone! After migrating our Checkmk server from Centos to Debian 12, our principal site is using too much CPU. When the nagios check starts on host, the CPU goes at 100 %.
You need to modify global settings to perform fetchers and checkers. Nagios checks use more CPU than agent services because every check is executed individually.
You can check OMD performance graphs in checkmk server to review these parameters.