A link to the recorded session http://parleys.com/play/52e7dcdbe4b05c6cd82b9230/chapter17/about

1. A (very) Short Intro. To
Java Mission Control
Haim Yadid - Performize-IT
lifeyx
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2. More Info
Java Mission Control and Flight Recorder Demo
(Series by OracleLearning @Youtube)
Java One Session
Oracle JRockit Mission Control Is Dead: Long Live
Java Mission Control:http://www.youtube.com/
watch?v=ExGzoYQqgkA
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3. What is Mission Control?
A monitoring and profiling tool for production
environments (also dev)
JMC consists of two components
Collection Infrastructure
GUI
CPU Profiling
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4. Collection Infrastructure
Flight recorder
A rotating buffer collecting profiling events
Like A black box in an aircraft
CPU Profiling
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5. GUI
Based on Eclipse
An Eclipse RCP
MBean Server
Management and Monitoring console(JMX)
Flight recorder (profiler)
A profiler based on the rotating buffer
CPU Profiling
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6. Origin
JMC was traditionally part of JRockit JVM
Oracle owns JRockit and Hotspot
Merge of JRockit into HotSpot
Bundled as part of the HotSpot JDK from J7u40
CPU Profiling: Terminology
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7. MBean Server
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8. What is JMX
Java Management Extensions (JMX)
JVM exposes MBeans (managed beans)
Reporting state of JVM resources
Which can be consumed by external tools:
JConsole
VisualVm
Mission Control
CPU Profiling: Terminology
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9. MBean Server
Can connect to any JVM on the machine, Using attach
mechanism (with attach mechanism limitations)
Can connect to a remote JVM if remote JMX params
A very flexible and customisable User Interface
Enables Filtering
Can persist monitoring data to a file
A demo soon
CPU Profiling: Terminology
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10. Flight Recorder
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11. Flight Recorder
High performance event recorder
Extremely low overhead
Records Event
Types of event
Duration [start, end]
Instant (exception)
Requestable (polling)
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12. Flight Recorder
A cyclic buffer holding latest history
Continuous recording
Free to use in development
Requires commercial license in production
Oops ….
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13. Enablement
!
J7u40+
-XX:+UnlockCommercialFeatures
-XX:+FlightRecorder
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14. Start flight recording Wizard
Timed
Continuous
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15. Templates
Continuous (for Production)
Profiling (for dev)
Custom (select you events and frequency)
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16. Recording dump
A file with extension .jfr
Opened in JMC
Has the following perspectives
General
Memory
Code
Threads
IO
System
Events
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17. Recording dump
A file with extension .jfr
Opened in JMC
Has the following perspectives
General
Memory
Code
Threads
IO
System
Events
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18. General Tab
Overview
JVM Information
System variables
Recording
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19. Memory Tab
Overview
GC (3 views)
Allocations
Object Histogram
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20. Code Tab
Overview
Hot Methods
Call Tree
Exceptions
Compilations
Class Loading
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21. Threads Tab
Overview
Contention
Thread dumps
Latencies
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22. IO Tab
Files
Sockets
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23. System Tab
Overview
Processes
Environment Variables
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24. Events Tab
Raw events
Logs
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25. Demo Time
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26. Thank You
www.performize-it.com
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