This service is disabled by default. To enable:
actioncable['enable'] = true
By default, ActionCable is run as a separate Puma server that only handles websocket connections. To run ActionCable on the existing Puma web server:
actioncable['in_app'] = true
Note: Action Cable is currently not supported for the Unicorn web server in GitLab.
ActionCable uses a separate thread pool to handle the websocket connections. The number of threads can be configured