I've got so annoyed by slow man-db updates, so I actually took time to look for the solution. It takes good 40 seconds on my otherwise super duper fast machine.
root ~ ls -lh /var/lib/man-db/auto-update -rw-r--r-- 1 root root 0 Nov 5 2018 /var/lib/man-db/auto-update root ~ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=18.04 DISTRIB_CODENAME=bionic DISTRIB_DESCRIPTION="Linux Lite 4.0" root ~ dpkg -l man-db Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-===============================-====================-====================-==================================================================== ii man-db 2.8.3-2ubuntu0.1 amd64 on-line manual pager -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1858777 Title: Processing triggers for man-db lasting extremely long To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/man-db/+bug/1858777/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs