Currently, the server uses 5 NIO selectors for the various types of channels it handles. Each of them has a separate associated thread pool to handle non-blocking I/O, but there is only one configuration property to specifiy the size of this thread pool.

We need to revisit this design, and in particular consider the following:

• should we have separate selectors?
• should we have a separate thread pool for each?
• should we consider a self-tuning strategy for the thread pool(s), eventually make it a pluggable strategy?
• how should this be tested / benchmarked?