We are working with a licensee and have a new Zen Server instance running in CI that is being populated by a Horde-based build. A large cook completed and then the Zen Server proceeded to hit the garbage collection timer and deleted most of the data. The log line showing the GC summary is attached. …

Yeah, restarting the zenserver when no cooks are running is the best as you might get errors in the running cooks when zenserver restarts.