FWIW I'm on 5.6.14-1-default now and libtirpc3-1.2.6-1.14.x86_64 and I don't see a memory hog issue, however with NIS enabled and pam_systemd.so still enabled on /etc/pam.d/common-session-pc I see *huge* delays on login, even if its not a NIS login, *and* even on sudo su -