5 Side notes JAX London 2016

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!