Gets the size of the pool, in terms of the number of worker threads.
Starts the worker pool by spawning new worker threads and a new pool manager thread.
Stops the worker pool, by stopping all worker threads and the pool's manager thread. After it's stopped, the pool can be started again via start().
A managed pool of worker threads for handling requests to a server. Uses a separate manager thread to periodically check and adjust the pool.
Note: This worker pool is considered to be deprecated, and won't receive any further updates beyond fixing critical errors.