Oracle has launched JDK Mission Control (JMC) 9, an replace to the instrument package for monitoring, managing, profiling, and troubleshooting Java functions that provides a darkish theme and makes the frequency of JVM checks configurable.
The most vital change is that JMC now should use JDK 17 or later to run.
JMC 9 was unveiled on April 21. Binaries could be downloaded from oracle.com. While JMC 9 requires JDK 17 or later, it nonetheless can learn Java Flight Recorder (JFR) recordings from JDK 7u40 or later. JMC and the JFR profiling and occasion assortment framework collectively supply a instrument chain to gather runtime info for after-the-fact evaluation.
Also with JMC 9, JMC has been up to date to make use of the Eclipse 4.30 SDK and helps a darkish mode, which could be enabled by going to Settings > General > Appearance and deciding on the “Dark” theme. The JVM browser has been up to date to permit customers to configure the frequency of checks for brand new JVMs (go to Settings > JDK Mission Control > JVM Browser > Local).
Other modifications in JMC 9:
- The Event Checkpoint Limit has been up to date to transcend the u4 restrict, thus following a change launched to JFR in JDK 20.
- The Event Browser now permits looking for occasions by Event Type ID. The ID additionally now could be displayed as a column.
- The Flame Graph now might be rendered utilizing Java Swing, as an alternative of utilizing an embedded browser, because it did earlier than. The transfer to Java Swing comes with graphical updates and enhancements to mannequin creation and efficiency.
- For GraalVM customers, it now could be attainable to allow JFR on a local picture.
- A brand new Inverted Parallelism rule checks how effectively parallel rubbish collectors execute.
- The guidelines engine that robotically checks a JFR recording for efficiency bottlenecks and different points has added just a few new guidelines.
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