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Questions tagged [jmc]

Java Flight Recorder and Java 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 how the Java Virtual Machine (JVM) and the Java application are behaving. Java Mission Control is an advanced set of tools that enables efficient and detailed analysis of the extensive of data collected by Java Flight Recorder. The tool chain enables developers and administrators to collect and analyze data from Java applications running locally or deployed in production environments.

http://www.oracle.com/technetwork/java/javaseproducts/mission-control/index.html

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Allocations in new TLAB vs allocations outside TLAB

The Java Mission Control tool in the JDK provides statistics about object allocation in new TLAB and allocations outside TLAB. (It's under Memory/Allocations). What is the significance of these statistics, what is good for the performance of an…
WannaKnow
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Java Mission Control from JDK 1.8.0_161 frozen upon startup on Mac OS X

I'm trying to launch Java Mission Control as provided in the JDK 1.8.0_161 on Mac OS X High Sierra (10.13.2, with Supplemental Update of January 2018) and the JMC application is frozen, i.e. I'm unable to browse in the JVM Browser panel. As I've…
Frédéric
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How to connect JMC (Java Mission Control) to remote JVM in ubuntu?

I am able to connect to JMC to the JVM while on the same system. However, I want to monitor a remote server. How do I connect my local JMC to my remote JVM?
Sireesh Vattikuti
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OpenJDK JDK11 not having JMC- Java Mission Controller- FlightRecorder

I was hoping JMC would be available with OpenJDK, JDK11 binaries as this has been opensourced from Java 11 by oracle, but could not locate this in Oracle and AdoptOpenJDK Java-11 binaries under bin folder. I have also tried this…
tarunk
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Where can I download Java Mission Control(7) (OpenJDK11 or higher)?

Java Mission Control(JMC) was announced to be handed over from Oracle to the open source community from JDK 11 onwards. However JMC is not bundled with the OpenJDK11 releases. I read that JMC will be provided as separate download here, but there are…
Simulant
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Java Mission Control (JMC) 6.0 does not show hot methods when examining a JFR flight recording

After using the Java Flight Recording functionality on a running application, Java's JMC could be used to examine the resulting JFR file to show hot methods, and a percentage of CPU time spent in each method. This was very useful for profiling…
Andrew Parks
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Java Mission Control in the JDK: What can it be used for for free?

Java Mission Control has been included with the Oracle JDK since Java 7u40. It is very clear from the JMC documentation that this is a commercial feature, but the JDK documentation does not clearly indicate when you can use JMC for free, and when…
Thorbjørn Ravn Andersen
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Monitoring Locks with Java Flight Recorder and Java Mission Control

What I want to do I have a Java program which I am trying to improve. I suspect synchronized blocks within the code to hurt performance but I would like to make sure this is my problem before touching my code. How I went on about it To check if…
Patrick
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Java Mission Control Heap Profile

I am playing with the new Java Mission Control Profiler that is coming with the Java 7u40 and I cannot make it to profile allocation and collect object statistics. No matter what I do, I cannot see any statistics in the Memory -> Object Statistics…
Aleš
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Java Mission Control displaying "Flightrecorder is not supported for non hotspot jvms"

When I was trying to profile my local Java application by running Java Mission Control (jmc), I wasn't able to connect to the application. It displayed 'Flightrecorder is not supported for non hotspot JVMs' in the description of all JVM processes…
Fanick
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Command-line-based daemon for Java Mission Control? Alternatives?

I have been asked to investigate Oracle Java Mission Control, so that server-side Java applications may be monitored and actions taken (e.g., alerts emitted and logged, flight recordings saved) under certain conditions. Java Mission Control's…
bernardo.m.luz
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Is Java Mission Control included with a JDK?

Are JMC binaries included in open JDK ? We have openjdk-1.8.0.252 in our Linux platform , but we do not have JMC ? Can we install JMC as separate application that runs on JVM already installed ? Can we use JMC in production environments ? If yes,…
Naveed
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Connect Java Mission Control to Wildfly 16

I try to connect Java Mission Control (JMC) with Wildfly 16. Application server lays on Docker. I successfully connected to wildfly via jconsole, to manage it I followed steps described here. Unfortunately, I have no luck to connect via JMC. The…
MyWay
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Java Flight Recorder - Continuous rolling recording

Question How to get a rolling recording into disk, with a maximum age? Context When something goes bad in my server, I want to be able to dump the profiling information of the hours prior and analyse it, to know what went wrong. As I don't know…
cmhteixeira
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How to record allocations with JFR on command line?

I have a profile I've created with Java Mission Control that has allocation profiling enabled. When I used it from the JMC UI to record, everything works fine and I get the results. However, after exporting the settings and trying to record with JFR…
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