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Questions tagged [jvisualvm]

jvisualvm is a Java Virtual Machine monitoring, troubleshooting and profiling tool. It is part of Oracle/Sun JDK since JDK 6 update 7 and is based on open-source project VisualVM.

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Schedule VisualVM to take a snapshot at certain intervals

Is there a way to take a Snapshot of CPU and Heap usage over time. Say every hour for 2 days?
DarVar
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jvisualvm 1.3.5 unable to get heap dump from my remote linux server

I want to get heap dump of jvm running on my remote linux prod server . The new jvisualvm 1.3.5 has the link to get heap dump but when I try to get heap dump I get the error telling cannot take heap dump from the remote server for…
user884424
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Lag due to threads swapping

I have come across some recent lag spikes in a game I have been developing. It is consistent, happens around the same time. Using the java profiler jvisualvm I have found it occurs at the same time a particular thread seems to restart or something…
Perry Monschau
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Duplicates in loaded classes shown by TraceClassloading

To track a permgen space OOM in our Tomcat tomcat-6.0.28 dev environment, we added TraceClassloading, TraceClassUnloading and JMX monitoring. The server has three webapps (devapp1,2,3) with almost identical frameworks and libraries (Spring,…
jalex
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clojure reduce function uses all cores even though it seems to be single threaded

(defn sum [numbers] (reduce + numbers)) (def numbers (into [] (range 0 100000000))) (time (sum numbers)) The above was the code that was ran. Simply adding up a lot of numbers. This line was executed in the repl multiple times: (time (sum…
Cui Pengfei 崔鹏飞
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Cant find JVisualVM executable in JDK bin

I am trying to install the JVisual VM in eclipse. Following these instructions and these, the executable should be located in my JDK bin directory, but I do not see it. Followed a number of other tutorials and they all state same. I have used…
dancingbush
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Display main class name of each JVM available like VisualVM

VisualVM does it really nice, each full main class name is displayed in the left side-bar navigation. How are these names retrieved? The Attach API offers all running JVMs with a display name, however, some display names seem a little bit bloated,…
Konrad Reiche
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Heap Size of a Java application is changing frequently

Allocated Heap Size is fluctuating for the java app. I am observing in JVisualVM that Heap Size of my application is fluctuating very often. I am observing decent GC activity as well. I am of assumption that once JVM allocates a specific Heap Size,…
KUMAR SAURABH
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What is the java.lang.Integer retained size?

I'm using Java Hotspot 1.8.0_191-b12 (64 bit, Xmx < 32 GB) and I'm looking at a jmap dump (hprof format) with various tools. VisualVM (and NetBeans profiler based tools) reports differ a lot from Yourkit and Eclipse Memory Analyzer. I looked at the…
jack malkovick
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VisualVM fails to start

After upgrading to Ubuntu 18.10 VisualVM 1.3.9-1 cannot start. It was installed through the package manager and I don't really want to install manually. I tried opening it with logging like: visualvm…
MitchBroadhead
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how to export MBeans data/statistics from JVisualVM

When I do a JMX connect to a java application using JVisualVM with MBeans plugin installed, I could see different MBeans configured in the application. However in order to analyze an issue. I need to export this data, from a production system, to a…
Sudheer Avula
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Enable JMXRemote monitoring

OS=Solaris 5.1 Java=1.6.0_101-b14 I'm having an issue with a java email daemon and want to monitor it via Java VisualVM. I have modified my script to enable jmxremote monitoring. -Dcom.sun.management.jmxremote…
gillockb
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Unable to profile JBoss 5 using jvisualvm

I've been getting some java.lang.OutOfMemoryError: GC overhead limit exceeded errors while running my Java app overnight: java.lang.OutOfMemoryError: Java heap space Dumping heap to java_pid6376.hprof ... Heap dump file created [512149941 bytes in…
Matt Ball
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How to match theoretical thread states and states showed by jvisualvm

If we will google something like 'java thread state' we will see approximately this diagram: But if we will open jVisualVm we will see following: Can you help to meatch these diagrams? Sleeping state is just Thread.sleep()? Special case of the…
gstackoverflow
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JMX connection fails with "handshake failed...expected JDWP-Handshake"

I'm trying to connect VisualVM to a remote JMX. IntelliJ can connect without hassle, but VisualVM fails with the following in log output: Listening for transport dt_socket at address: 5005 Debugger failed to attach: recv failed during handshake:…
crockpotveggies
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