Yeah, that’s my bad.
High line was at about 6,5 MB/s and the lower at 3,2 MB/s.
/usr/bin/check_mk_agent > /dev/null → Hence nothing is written locally by the command itself.
The syslog only writes 3 lines when cmk is executed every minute.
Stopping the watch loop brings down the idle IO to almost zero again as previously posted.
BTW the agent version is 2.1*