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Any modification of profiling blocks the computer for some amount of time (couple seconds or more), during which time, the user cannot use the computer - all apps are blocked, in some cases even the mouse pointer does not move. The profiler is in the RedefineClasses call during this time - it is expected that the profiled application would be frozen during this time, but the rest of applications should run and the user should be able to interact with them.
This is a VM issue, where the RedefineClasses freezes the machine. It will have to be fixed in the JDK, see: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6173565
Verification of old issues.
Closing old issues
Reverting to original Target Milestone value changed by mistake. Sorry for inconvenience.