[Bug 2024] New: [STORY] Number of threads chart should not require turning on thread recording

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=2024

            Bug ID: 2024
           Summary: [STORY] Number of threads chart should not require
                    turning on thread recording
           Product: Thermostat
           Version: hg
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Thermostat
          Assignee: unassigned at icedtea.classpath.org
          Reporter: sgehwolf at redhat.com
                CC: thermostat at icedtea.classpath.org

As a user I'd like to see the chart of currently running threads (thread count)
and the number of daemon threads without turning on the thread recording
feature.

Implementation note: Relevant counters are exposed via jvm-stat counters. Thus
by using this feature rather than JMX this should be possible without incurring
too much overhead. The counter is called "java.threads.live" for live threads.
See:
https://bitbucket.org/jerboaa/thermostat-thread-events/src/ac8dff62d2e9073c4e73c3352cd2e07f134331ab/agent/src/main/java/com/redhat/thermostat/plugins/tutorial/thread/events/agent/internal/VmThreadLiveCountListener.java?at=default

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