ActionCable
ActionCable is run as a separate Puma server that only handles websocket connections.
Note: ActionCable is experimental and the features that use this service are behind feature flags.
This service is disabled by default. To enable:
actioncable['enable'] = true
Configuring the worker pool size
ActionCable uses a separate thread pool to handle the websocket connections. The number of threads can be configured
using the actioncable['worker_pool_size']
option.