Seed Database issue
I followed this doc (https://docs.gitlab.com/omnibus/settings/database.html) to install GitLab with external PostgreSQL. When I did the step Seed DB (gitlab-rake gitlab:setup), I had an error : PG::ObjectInUse: ERROR: database "gitlabhq_production" is being accessed by other users but it doesn't block anything and seed db succeeded.
As after reconfigure gitlab, it's normal that gitlabhq_production accessed by gitlab, maybe it should mention in the documentation something like Stop Gitlab before seed database ? Or this error doesn't take any effect ?