Java -XX: UnlockCommercialFeatures \ -XX: FlightRecorder \ -XX:StartFlightRecording=filename=myrecording.jfr,dumponexit=true \ MyApp JRE: command-line parameters to start a java program with JFR enabled JDK: also supports attaching JFR to running JVM using the jcmd command Using the Java Mission Control (JMC) for other purposes on the JDK does not require a commercial license." * * The rest of this presentation is my opinion and doesn‘t necessarily represent Oracle However, to enable JFR on a production server, you must have a commercial license. You can use it for free on developer desktops or laptops, and for evaluation purposes in test, development, and production environments. (I don‘t work on JFR and JMC internals)ģ Java Flight Recorder command-line tool for collecting profiling data from running JVMs sampling based, for low overhead focus on CPU, threads, socket and file usage originally JRocket Mission Control, part of BEA‘s JRocket JVM part of the Oracle hotspot JVM since since Java 7īyte code is instrumented Accurate invocation counts Distorted call times (possibly severe) Sampling: Byte code is not instrumented No invocation counts Fairly accurate call times (depending on frequency) Infrequently called messages may be missedĥ Oracle says: "The Java Flight Recorder (JFR) is a commercial feature. Presentation on theme: "Java Flight Recorder and Java Mission Control"- Presentation transcript:ġ Java Flight Recorder and Java Mission ControlĢ about the presenter software engineer at Oracle middleware products: SOA Suite and Integration Cloud Suite over 15 years as a java developer including work at BEA Systems, MetaMatrix, and Tripos I use JFR and JMC to diagnose issues in test and production.
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