Thread pool configuration

[Alan Bateman]

A number of people have mailed me in the last few weeks with various 
questions on how thread pools are used by the asynchronous I/O 
implementation. I've started a page [1] with a few notes that may be 
useful.  When I get time I will update it with details as to how to 
interpret thread dumps on each operating system as that is important to 
diagnose problems (the thread dumps do vary by operating system due to 
the differences in the I/O facilities used).

-Alan.

[1] http://openjdk.java.net/projects/nio/resources/AsynchronousIo.html