Servers running a couple of Docker containers on Swarm has tasks.db using a few GBs of disk space. Docker containers are deployed globally on 2 servers, both Swarm managers, and their tasks.db gradually fill up 8 GBs of each server's disk space. Docker version is 17.06.1-ce.

What could be taking up such enormous space in tasks.db? How do I prevent tasks.db from growing?