Java Mission Control
JDK Mission Control Java Flight Recorder and JDK Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collection framework built into the Oracle JDK. It allows Java administrators and developers to gather detailed low level information about h
Java™ Mission Control Release Notes
Documentation Java Mission Control (JMC) is a commercial feature available for Java users with a Commercial License. New Features DTrace Plug-In Limitations Known Issues The JDK 7 update 40 release includes the first release of Java Mission Control (JMC) that is bundled with the Hotspot JVM. New Features Several new and improved features are available in this release: New JVM Browser The JVM Brows
Print All JVM Flags
Found an interesting JVM Flag : java -XX:+UnlockDiagnosticVMOptions -XX:+PrintFlagsFinal -version It prints hundreds of various options, I never heard about before. It also prints default values, that helps diagnose JVM behaviors better. Another interesting flag is: -XX:+UnlockExperimentalVMOptions Does anyone knows of any documentation which explains each one of them ?
Cannot create JVM with -XX:+UseLargePages enabled
I have a Java service that currently runs with a 14GB heap. I am keen to try out the -XX:+UseLargePages option to see how this might affect the performance of the system. I have configured the OS as described by Oracle using appropriate shared memory and page values (these can also be calculated with an online tool). Once the OS is configured, I can see that it allocates the expected amount of mem
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http://jose-manuel.me/2012/11/how-to-enable-the-jvm-option-uselargepages-in-redhat/
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