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Questions tagged [java-mission-control]

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.

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.

See http://www.oracle.com/technetwork/java/javaseproducts/mission-control/java-mission-control-1998576.html

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What are the differences between JVisualVM and Java Mission Control?

Other than the more 'advanced' GUI from Java mission control, how are they different? At first glance they seem to offer very similar functionality (Interpreting JMX data and Memory/CPU profiling). However, as they are both shipped with the JDK (I'm…
GoldenJam
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Do Java Mission Control and Flight Recorder deliver same functionality as VisualVM?

The (relatively) new built-in performance monitor/profiler for Java is Mission Control. The Oracle docs advertise that they can be used in production without incurring performance hits (less than 2%): The tool chain [Mission Control + Flight…
smeeb
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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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How to include IO-bound methods in Java Flight Recorder sampling?

I'm starting JFR at launch by specifying the following CLI options to the Java program under test: -Xmx24g -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -XX:FlightRecorderOptions=defaultrecording=true,dumponexit=true,settings=profile The test…
Alex R
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Possible Memory Leak in Jersey 2?

I had recently migrated my REST APIs from Jersey 1 to Jersey 2 (2.22.1 to be exact). The application is running as a spring boot app. The application receives a fairly large amount of traffic. I profiled the application using JMC(Java Mission…
Kiran
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Dump part of Java Flight Record

Suppose I have configured a continuous flight record for my JVM using the following flags java -XX:StartFlightRecording=disk=false,dumponexit=true -XX:FlightRecorderOptions=memorysize=200m -jar .... As far as I understand, this configuration stores…
Dragas
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How to chase a JFR event over multiple threads

I'm struggling to model asynchronous servlet request processing with custom JFR events. The challenge I'm facing is that in asynchronous processing a request may be #dispatch()ed several times. This means the whole request processing chain may be…
Philippe Marschall
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Java Mission Control 7.1 shows too few method profiling samples

A similar question was asked here. I'm profiling an Open JDK 11.0.2 application using JMC 7.1.0 which I've built according to the instructions. The application is utilizing about 3 cores, there is no excessive gc and only a small portion of the time…
Amir Hadadi
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Java mission control - save custom charts between sessions

Java mission control is absolutely great tool for monitoring applications. There is however one thing that gets on my nerves. I have many custom values that I chart on custom chart ("My Chart1") (request count per second, current busy threads etc.)…
user3364192
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Is there a way to find total TLABs allocated in JMC 7.x, like there was in JMC 5.x?

In Java Mission Control 5.x, you could easily view the total size of allocated TLABs. See the "Allocation Summary" in the bottom right of this image. In Java Mission Control 7.x, I can't find an easy way to find this high-level information. I can…
beachwood23
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Java Flight Recorder - Logging parameters on JDK17

My jfr log does not contain any information about Memory / TLAB Allocation section , if analyze it by MissionControl JVM parameters (JDK17): -XX:+UnlockDiagnosticVMOptions -X::+DebugNonSafepoints -XX:UnlockCommercialFeatures -XX:+FlightRecorder…
27P
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Java Flight Recording does not report DeadLock in Java Mission Control

I was trying to simulate a deadlock situation that I was going to record with Java Flight Recorder and inspect with Java Mission Control. By some reason blocked threads are not marked as blocked under Threads section and Automated Analysis in Java…
svishnyakoff
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Java Flight Recorder - find file descriptor leak

M Java application probably has a file descriptor leak, since I'm getting a Too many open files exception. I'm running my application with JFR, and when I inspect File I/O I barely see any I/O count. Is it possible to use JFR for finding code which…
Ori Popowski
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Take more method count with Flight Recorder and JDK Mission Control

Background I am trying to inspect my Java batch application with Flight Recorder to improve the launching performance. Now it takes about 20 seconds to launch, and I am struggling to make it less than 10 seconds. The application is built with Spring…
SATO Yusuke
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Max Live Size and Max Live Count do not make sense

When looking in the Memory tab, I have a class which have 8.96 GiB Max Live Size while the Max Live Count it 401,000,000. This a a Scala Cons class which is an element in a LinkedList of type Byte. By this logic, 401M bytes is 401 MiB (maybe times…
Ori Popowski
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