The easiest way to use thread pools in Scala is to use an ExecutionContext. Akka will let you define an ExecutionContext from a configuration file using a wrap

The easiest way to use thread pools in Scala is to use an ExecutionContext. Akka will let you define an ExecutionContext from a configuration file using a wrapper called a Dispatcher -- you can ramp up the parallelism-max setting for more cores. Then you do actorSystem.dispatchers.lookup("my-dispatcher") and pass it to all the actor based code that you are using. You can use a work pulling set of actors to handle computation after that, or use Akka Streams to provide backpressure, to avoid the OOM problem.