JProfiler 是一个商业的主要用于检查和跟踪系统（限于Java开发的）的性能的工具。JProfiler可以通过时时的监控系统的内存使用情况，随时监视垃圾回收，线程运行状况等手段，从而很好的监视JVM运行情况及其性能。

JProfiler 的新版发布，通常要很好久好久才会发现放出的key

期待L-Larry_Lau  

Release 8.0   |    2013-07-17

New features:
Tracking of RMI, web service and remote EJB calls between multiple profiled JVMs
MongoDB probe
HBase probe
Cassandra probe
Class loader probe with cross-link into the heap walker
Recording profiles for switching on multiple recording types at the same time
Support for loading PHD snapshots from IBM JVMs
Support for profiling Java 8
Heap walker: Optional retained size column in the classes view of the heap walker
Heap walker: Action to use all retained objects for the current object set
Heap walker: Actions to use retained objects for the selection in the classes and references views
Heap walker: Action to use loaded classes for a class loader instance in the references views
Heap walker: The class loader grouping table now has an action for using the selected class loader instance
Reduced overhead, synchronization and allocations in the probe recording system
Reduced overhead for recording exceptional method runs
The status bar now shows all active recording types with a balloon
All lists are now quick-searchable
Support for JAR directories for local session types

New demo session: "Demo server" that helps to experiment with several probes

Bugs fixed:

Script classes were not recompiled when the selected JVM was changed

Hot spots views: Exceptional methods runs were not merged in backtraces
Session settings: Relative paths in java file paths were not interpreted as relative to the installation directory