VisualVM | 易学教程

How do you run jvisualvm.exe under the local system account under Windows Server 2003?

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I am running GlassFish 3.0.1 as a windows service under Windows Server 2003 with Java 1.6 u 20, and am generally happy. I would like to be able to use VisualVM on this JVM and used Unable to use JConsole with Tomcat running as windows service as a starting point, but starting with PsTools\PsExec.exe -i -s "C:\Program Files\Java\jdk1.6.0_20\bin\jvisualvm.exe" results in a jvisualvm.exe and a nbexec.exe process showing up in Task Manager with SYSTEM as the user but I do not see any GUI from the program as I do when I run it manually as myself. I am logged in with Remote Desktop from Windows 7 in

Why aren't all methods displayed in VisualVM profiler?

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I am using VisualVM to see where my application is slow. But it does not show all methods, probably does not show all methods that delays the application. I have a realtime application (sound processing) and have a time deficiency in few hundreds of microseconds. Is it possible that VisualVM hides methods which are fast themselves? UPDATE 1 I found slow method by sampler and guessing. It was toString() method which was called from debug logging which was turned off, but consuming a time. Settings helped and now I know how to see it: it was depending on Start profiling from option. I don't have

VisualVM - not a valid core dump

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I have .hprof heap dump generated from JVM OutOfMemory (JDK 1.5 version). When I try to add this file in VisualVM, it tells me file is not a valid core dump. However from I'm able to run jhat for this dump file without any issue. any ideas why ? The file you are trying to open is a Head Dump not a Core Dump . Follow this steps: Go to File > Load... Select the File Format: as Heap Dumps (*.hprof, *.*) Choose your file and click on Open. Heap dump is not a core dump. So you have to open your .hprof file as a heap dump in VisualVM. 来源： https://stackoverflow.com/questions/7095805/visualvm-not-a

How do I give a name to a VisualVM “<Unknown Application>”?

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问题 JDK 1.6 comes bundled with a handy tool called VisualVM that lets you inspect and interact with running Java processes. One feature is that it auto-detects running JVMs on the local machine. Most are listed as " (pid xxxx)" but some have a name and an icon, like VisualVM itself and others like NetBeans (see the screenshot in this dzone article for example). How do I inject my application name and icon into the JVM so it shows up properly in VisualVM's application list? Does my app need to be

Can visualvm connect automatically via JMX to a remote process?

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问题 I have a Java process running on a remote machine, and the process sets up some mbeans. I also have jstatd running on that machine as the same user as the Java process. (The mbeans can be set up programmatically or using -Dcom.sun.management.jmxremote... etc, this doesn't appear to make a difference). VisualVM is able to make a jstatd connection to the process, which it discovers automatically, but this means I don't get access to mbeans or, for example, the CPU history chart. Alternatively I

Java heap size not entirely used

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问题 I'm currently monitoring my running java application with Visual VM: http://visualvm.java.net/ I'm stressing the memory usage by with -Xmx128m. When running I see the heap size increasing to 128m (as expected) however the used heap converges to approximately 105m before I run into a java heap space error. Why are these remaining 20m, not used? 回答1: The heap is split up in Young-Generation (Eden-Space, and two Survivor-Spaces of identical size usually called From and To), Old Generation

VisualVM unable to sampler memory

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问题 I have a tomcat instance with the JMXRemote parameter configured. The local VisualVM is able to get a sampler on CPU, however, not for Memory. The memory button is grayed out with a summary saying: "Memory sampling: Not available. Cannot connect to target application. Make sure the application is running on a supported JDK 6 or JDK 7" JMXRemote parameter: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9086 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management

Monitor .NET Threads

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Is there any way to monitor/log thread interactions in the .NET runtime much like VisualVM does for Java? I don't have a specific need at the moment but I think it would be nice to see how all the threads in my application interact. I am unfamiliar with VisualVM in Java....but.... If you are trying to accomplish this programmatically...check out the WMI Performance Counters. I am currently working with them myself! MSDN Link to WMI Performance Counters Remember If you are trying see the performance counters, use the server explorer in Visual Studio .NET. You can see all of the performance

What are the differences between JVisualVM and Java Mission Control?

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问题 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 using JDK 1.7.0_51 SE) I'm assuming there are significant differences, otherwise they would be combined into a single solution. Especially as this increases the size of the JDK significantly. Is Java Mission Control ultimately going to replace

How do I provide JVM arguments to VisualVM?

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问题 I'm using VisualVM from JDK 1.6.0_26 to profile a Java webapp running under Tomcat, but VisualVM often tells me that it doesn't have enough memory to take a snapshot, and to use the -Xmx switch to provide more memory to Netbeans. The problem is, I'm running VisualVM outside of Netbeans, so how can I provide JVM arguments to jvisualvm.exe? 回答1: Should be able to modify the memory settings in %JDK_HOME%\lib\visualvm\etc\visualvm.conf Xms and Xmx are in the default_options line. 回答2: or I think