How can I see the delayed job queue?

DelayedJob stores a database record for each enqueued job so you can retrieve them directly through the rails console (assuming you are using ActiveRecord or similar).

Open the rails console:

$ rails c

and then query the enqueued jobs:

Delayed::Job.all

or

Delayed::Job.last

Check out the documentation.

If you installed delayed_job with another database like Redis you may want to go and check in there the queued jobs.