In the last few weeks, I've been chasing an ugly native resource exhaustion issue, and was able to make use of some of the JMX instrumentation in areas like NIO.
For example, run a recent jconsole and connect to a JDK7 JVM. Go to the MBeans tab, then open something like java.nio->BufferPool->Attributes. You can see the amount of buffer/memory use (double click on the number to go to a chart view).
Is there some data that would be useful to display here? Most of our process-related stuff we're dumping is controlled by the System Properties (javax.net.debug/java.security.debug), and I can't really think of anything obvious at the system level. Installed/active JCA security providers maybe?
Anyone have any ideas to propose? Brad
