maxWorkerThreads - maximum number of worker threads available in the thread pool (default is 20 per CPU, recommended is 100)
minWorkerThreads - Минимальное число рабочих потоков в пуле - minimum number of worker threads available in the thread pool (default 1 per CPU, recommended is half of maxWorkerThreads value)
maxIOThreads - maximum number of threads that can be allotted to perform input/output (I/O) operations (default is 20 per CPU, recommended 100).
minIOThreads - Минимальное число асинхронных I\O потоков в пуле - minimum number of threads that can be allotted to to perform input/output (I/O) operations (default 1 per CPU, recommended is half of maxIOThreads value)