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5 Side notes JAX London 2016

Quick notes from session 5 of JAX London 2016. Java Flight Recorder preseneted by Ola Westin from Oracle.

· Q.Assistance · 1 minutes ·

A woman on the background holding a java logo on her fingers.

Overview

11th Oct — 13:45 to 14:35 Java Flight Recorder — Production Time Profiling On Demand by Ola Westin From Oracle

Notes

  • InfoQ article about this session.
  • Java flight recorder: Java Flight Recorder (JFR) is a tool for collecting diagnostic and profiling data about a running Java application.
  • Java mission control: Oracle® Java Mission Control for Eclipse is a set of plug-ins for the Eclipse IDE designed to help develop, profile and diagnose applications running on the Oracle® Java HotSpot VM.
  • Key concepts:
    • Configure durable events with thresholds levels to discard events within boundaries.
    • Not tracking native calls yet.
    • Configure continuous recording of the JVM with dump results on exit or on demand.
    • Configure time-boxed recordings at a set time.
    • With the tool Jcmd we can send commands to the JVM in order to control Java Flight Recordings, troubleshoot, and diagnose JVM and Java Applications.
    • Using JMX it is possible to trigger recording sessions when thresholds are breached.
    • Those tools can operate remotely from the JVM under test.

That was all for this session.

Many thanks for reading, please leave a comment if you have any quality hint.

Keep on testing, better!

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