Comment 3 for bug 1685376

Norbert (nrbrtx) wrote :

I suspect that "apt-daily-upgrade.service" and "apt-daily.service" (both call /usr/lib/apt/apt.systemd.daily) cause Synaptic to rebuild apt-xapian-index. I disabled them with
sudo systemctl disable apt-daily.timer
sudo systemctl disable apt-daily-upgrade.timer

I'm not on production server, so I think I can do so. Do not repeat this if unsure.