Johan Janssen, Info Support
�Current situation
�Why should we use a profiler?
�Java Mission Control�Java Mission Control
�Java Flight Recorder
�JOverflow plugin
�Demo
�Questions
�High application response time
�High memory usage (per end user)
�High CPU usage�High CPU usage
�High I/O
�We want to create high quality software!
�Increase Java memory settings
�Increase physical memory
�Increase CPU’s�Increase CPU’s
�Distribute application over multiple
machines
�Scaling is difficult
oMemory per machine is limited
oMemory bandwidth is limited
Garbage collection�Garbage collection
�Maintenance cost
�We still have low quality software!
�High performance
oMinimal overhead (1-3%)
oUsable in productionoUsable in production
�New in Java 7 u40
�Integrated in the Hotspot JVM from the
JRockit JVM
�Commercial feature for production
�Free for development use
�Method profiling
�Allocation profiling
�I/O analysis�I/O analysis
�Garbage collector analysis
�Third party events analysis
�Exceptions analysis
�Heap analysis
�Configure triggers
� JMX compliant monitoring tool
� Dynamically monitor and manage the JVM
� Analyze recordings made by the Flight Recorder
� Fully customizable dashboards� Fully customizable dashboards
� Java 7 u40 contains 5.2.0
� Java 8 contains 5.3.0
o Minor release
o Bugfixes and incremental improvements (UI
etcetera)
o Eclipse support
�Eclipse
o Integration with codebase
�Application $JDK$\bin\jmcApplication $JDK$\bin\jmc
�Adjust eclipse.ini-showsplash
org.eclipse.platform
-vm-vm
C:\Program Files\Java\jdk1.8.0_05\jre\bin
�Install new softwarehttp://download.oracle.com/technology/products/missionconhttp://download.oracle.com/technology/products/missionconhttp://download.oracle.com/technology/products/missionconhttp://download.oracle.com/technology/products/missioncontrol/updatesites/base/5.3.0/eclipse/trol/updatesites/base/5.3.0/eclipse/trol/updatesites/base/5.3.0/eclipse/trol/updatesites/base/5.3.0/eclipse/
�Install Mission Control
�JConsole++
�Live, real time monitoring of JVM
�Triggers�Triggers
�Record and analysis tool for JVM’s
�JVM events are recorded in detail
�Minimal performance impact�Minimal performance impact
�Recording files
o JFR binary
�Multiple recordings at the same time
�Eclipse
�Application $JDK$\bin\jmc
�Commandline�Commandline
�Jcmd
�Use correct JDK
�Specify correct options:�Specify correct options:
-XX:+UnlockCommercialFeatures
-XX:+FlightRecorder
�Perform heap dump
�Visualize heap dump
�Analyze heap dump (automatically) �Analyze heap dump (automatically)
�Unused data structures
�Data structures that reserve more
space as the default size is bigger
�Objects instead of primitives
�Complex collections instead of arrays
�Duplicate data
� Apply manual patch before installing plugins!!Apply manual patch before installing plugins!!Apply manual patch before installing plugins!!Apply manual patch before installing plugins!!
� Remove the following lines from
<JDK>/lib/missioncontrol/configuration/org.eclips
e.equinox.simpleconfigurator/bundles.info :e.equinox.simpleconfigurator/bundles.info :
org.eclipse.equinox.log.nl_ja
org.eclipse.equinox.log.nl_zh
org.eclipse.equinox.supplement.nl_ja
org.eclipse.equinox.supplement.nl_zh
�Overlap with Mission Control
�Tools are part of OpenJDK
�Likely to stay alongside Mission Control�Likely to stay alongside Mission Control
�Development will focus on Mission
Control
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