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

johan.janssen@infosupport.com