Hi all!
I read about (librenms_return_optimizer) and decided to try it out. But, unfortunately, I do not understand where it is necessary to substitute the line
extend portactivity /usr/local/bin/lnms_return_optimizer – /etc/snmp/extends/portactivity smtps,http,imap,imaps,postgresql,https,ldap,ldaps,nfsd,syslog-conn,ssh,matrix,gitea