Increase checkmk check interval to a longer interval in order to save CPU resources on the server and target systems

Try to lower the frequency of checkmk runs.

• Search check interval from the "Setup" from checkmk interface

• Create a rule for "Normal check interval for service checks"

• Create a rule for "Normal check interval for host checks

References:

https://docs.checkmk.com/latest/en/monitoring_basics.html
https://forum.checkmk.com/t/solved-change-check-interval-of-my-own-datasource-program-checks/20312
https://forum.checkmk.com/t/check-mk-english-how-to-set-frequency-of-mk-apt-plugin/12123

Suggestion: disable irqbalance service on Virtual Guests (Virtual Machine)

irqbalance is a Linux daemon that distributes interrupts over among the processors and cores in your computer system. The design goal of irqbalance is to do find a balance between power savings and optimal performance. To a large degree, the work irqbalance does is invisible to you. The daemon balances savings in power consumption with performance. On Virtual Guests (Virtual Machine). It does not really make sense because unless you are pinning the guest to specific CPUs and IRQs and dedicated net/storage hardware, you will likely not see the benefits you would on bare metal. On my Debian VM:

mds@debian:~# dpkg -l|grep irq
ii  irqbalance                    1.5.0-3                      amd64        Daemon to balance interrupts for SMP systems
root@download:~# dpkg --purge irqbalance
(Reading database ... 32086 files and directories currently installed.)
Removing irqbalance (1.5.0-3) ...
Purging configuration files for irqbalance (1.5.0-3) ...
Processing triggers for systemd (241-7~deb10u7) ...