Check_MK Agent causing high Disk IO

[Heavy]

@DerD

Looking into that I think that this is related to the APT updates agent plugin provided by check_mk. Even with async it causes a disk IO spike.

Interestingly enough the script from LibreNMS that extends the SNMP run doesn’t create anything close to that high IO. So what is so different with the check_mk approach?

The mk_apt agent plugin is rather simple. In it’s default configuration, it basically does (some options skipped):

apt-get update
apt-get -s upgrade

The first step updates the package lists from the Debian/Ubuntu mirrors. The lists can be quite big, depending on the contents of your sources.list.