Take a look at the "Java Management Extensions (JMX) and Windchill MBeans" section of the Windchill Specialized Administration Guide:
http://support.ptc.com/WCMS/files/156798/en/WCSpecializedAdminGuide.pdf#Page=261
The "Windchill MBeans" section of the chapter provides documentation on some of the PTC provided MBeans.