Question

On a similar note, how can you know how many workers there are currently assigned?

Answer 1

If you are on your local machine, just run one of the following

# starts the worker
rake jobs:work 
# kills it
Control + C on your keyboard

or

# starts the worker
script/delayed_job start
# kills it
script/delayed_job stop

Additionally, here are some commands to spawn multiple workers: https://github.com/collectiveidea/delayed_job/wiki/Delayed-job-command-details

If you want a list of currently running workers, you would do

script/delayed_job status

and this would return each process (which you’d then have to count to get the integer value)

If you are on Heroku, you can do heroku workers to get the number of current workers, and heroku workers 2 to start two workers or heroku workers 0 to kill all workers.

You can also use HireFireApp.com to manage all of your workers for you on Heroku.

Since you didn’t specify what type of environment you are running DJ on, please let me know if these don’t answer your question.