The document outlines the features and functionalities of Thermostat, an open-source serviceability and monitoring tool for Java applications, highlighting key performance metrics and actions related to the JVM. It discusses new features, demo plugins, release history, development practices, and potential contributions. The document emphasizes community involvement and future tasks aimed at enhancing Thermostat's capabilities.

2. Analyzing Java Applications Using Thermostat
Omair Majid

3. Agenda
● Performance
● Thermostat
● Demos
● Plugins
● Getting Involved

4. What Do You Care About?

5. Performance - Host
● What information do I care about?
– OS
– CPU
– Memory
– IO

6. Performance JVM
● What JVM information do I care about?
– CPU Usage
– Memory Regions
– Garbage Collection
– Loaded Classes
– JMX Notifications
– JIT Compilation Time
– I/O Calls
– Threads

7. JVM Actions
● What can I ask the JVM to do?
– Heap Dumps
– Invoke Garbage Collector
– Deadlock Detection
– Inject Custom Code

8. Too many things!

9. Thermostat
● Serviceability and Monitoring for OpenJDK
● Multiple Hosts/JVMs
● Plug-in Architecture
● Command Line & GUI
● Open Source

10. Thermostat
$ thermostat local
$ thermostat web-storage-service
$ thermostat shell

11. Thermostat

12. Demo

13. Components

14. Components

15. Components

16. Components

17. Components

18. Components

19. New Features
● Heap Tree Map
● Profiling
● Setup
● Tab Completion
● I/O Metrics
● New GC Details
● Security Improvements

20. Demo

21. Plugins
● Customize Agent and/or Client
– Collect, Record, Analyze your own metrics
– Integrate your own tools
● Most Built-in Functionality are Plugins
● Loaded using OSGi
● Documented & Stable API
http://icedtea.classpath.org/thermostat/docs/1.4/javadocs/

22. Demo

23. Release History
Initial Release
May 2012
Version 1.0
November 2013
Version 1.2
December 2014
Version 1.4
November 2015

24. Development
● Adhering to standard API versioning
● API breaking changes Thermostat 2.0→
● Non-breaking changes Thermostat 1.6→
● Bug fixes Thermostat 1.4.x→

25. Future Tasks
● Byteman Integration
● Platform API
● Integration with more tools
● Security Improvements

26. Try Us
● Red Hat Enterprise Linux 6 and 7
– Red Hat Software Collections (1.1+, 2.0+)
yum install thermostat1-thermostat
● Fedora 21+
yum install thermostat
● Source Releases
http://icedtea.classpath.org/download/thermostat/

27. Contributing
● Potential Tasks
– New Metrics
– Porting to other architectures or operating systems
– New Clients (Web, Mobile, Eclipse?)
● Mailing List
http://icedtea.classpath.org/mailman/listinfo/thermostat
● IRC
#thermostat on freenode

28. Don't Miss
● Monitoring application-specific behavior using Thermostat and
Byteman
– Presented by Andrew Dinn, creator of Byteman
– Wednesday 11:30 a.m. to 12:30 p.m.
– Room 132
+

29. Thank you
http://icedtea.classpath.org/thermostat