VisualVM

Saving VisualVM information as data

由 吃可爱长大的小学妹 提交于 2021-02-20 19:08:09
问题 Using VisaulVM, I'd like to obtain this as data, without image processing algorithms being applied... How can I do that? I think this won't come out of a snapshot. I am not sure how VisualVM and jVisualVM vary, the naming is sure confusing, but I'm running the Oracle supplied one ( Version 1.7.0_80 (Build 150109) ) Thanks! 回答1: You can use Tracer plugin with various probes. Tracer can export data in CSV, HTML or XML. 回答2: All this information is available through JMX. That's how VisualVM gets

Saving VisualVM information as data

由 风流意气都作罢 提交于 2021-02-20 19:07:50
问题 Using VisaulVM, I'd like to obtain this as data, without image processing algorithms being applied... How can I do that? I think this won't come out of a snapshot. I am not sure how VisualVM and jVisualVM vary, the naming is sure confusing, but I'm running the Oracle supplied one ( Version 1.7.0_80 (Build 150109) ) Thanks! 回答1: You can use Tracer plugin with various probes. Tracer can export data in CSV, HTML or XML. 回答2: All this information is available through JMX. That's how VisualVM gets

visualvm - Local java applications cannot be detected

由 柔情痞子 提交于 2021-02-20 18:55:23
问题 I am trying to run visualvm in my Windows 8 machine and i am getting error 'Local java applications cannot be detected'. I tried to follow the below steps to resolve the issue as suggested in 'https://visualvm.github.io/troubleshooting.html'. I gave full permission to my 'AppData\Local\Temp\hsperfdata_Dhasan' folder. But still i am getting the same error whenever i start visualvm. Please help me to fix this issue. Thanks. 回答1: Quit all java applications and delete hsperfdata_Dhasan folder. 来源

Java的几种线程状态说明

由 谁都会走 提交于 2021-02-12 21:29:02
Java的几种线程状态说明 1、NEW（新建） java.lang.Thread.State枚举中的NEW状态描述： 1 2 3 4 /** * Thread state for a thread which has not yet started. */ NEW 创建后尚未启动的线程处于这个状态。 意思是这个线程没有被start()启动，或者说还根本不是一个真正意义上的线程，从本质上讲这只是创建了一个Java外壳，还没有真正的线程来运行。 不代表调用了start()，状态就立即改变，中间还有一些步骤，如果在这个启动的过程中有另一个线程来获取它的状态，其实是不确定的，要看那些中间步骤是否已经完成了。 2、RUNNABLE（可运行） java.lang.Thread.State枚举中的RUNNABLE状态描述： 1 2 3 4 5 6 7 /** * Thread state for a runnable thread. A thread in the runnable * state is executing in the Java virtual machine but it may * be waiting for other resources from the operating system * such as processor. */ RUNNABLE

性能优化系列三：JVM优化

由 断了今生、忘了曾经 提交于 2021-02-12 11:16:56
一、几个基本概念 GCRoots对象都有哪些 所有正在运行的线程的栈上的引用变量。所有的全局变量。所有ClassLoader。。。 1.System Class .2.JNI Local 3.JNI Global 4.Thread Block 5.Busy Monitor 6.Java Local 7.Native Stack 8.Unfinalized 9.Unreachable 10.Java Stack Frame 11.Unknown 栈帧的解释 Java虚拟机栈（Java Virtual Machine Stacks）是线程私有的，它的生命周期与线程相同。虚拟机栈描述的是Java方法执行的内存模型：每个方法被执行的时候都会同时创建一个栈帧（Stack Frame）用于存储局部变量表、操作栈、动态链接、方法出口等信息。每一个方法被调用直至执行完成的过程，就对应着一个栈帧在虚拟机栈中从入栈到出栈的过程。 简单地说，栈帧就是一个方法，里面有输入输出参数，局部变量表，返回值等信息，第一个参数一定是this 方法区说明 与Java堆一样，是各个线程共享的内存区域，它用于存储已被虚拟机加载的类信息、常量、静态变量、即时编译器编译后的代码等数据。 举例：有一个HelloWorld的类如下 import java.text.SimpleDateFormat; import java

VisualVM Reporting

由 时光总嘲笑我的痴心妄想 提交于 2021-02-11 03:02:06
问题 I am performing load test on JMeter for webbased application, and i have to get CPU Utilization, Memory Utilization, number of Threds. For this i am using VisualVM. Is there any way we can get as Report in the form of XLS or CSV or any other format we can give to the Customer. Could you pleasee help me on this or otherwise is there any other Performance tool we can get CPU,Memory utilization? -- Thanks, Raghu.ch, 回答1: You can use Tracer plugin with various probes. Tracer can export data in

VisualVM Reporting

由 蹲街弑〆低调 提交于 2021-02-11 02:53:52
问题 I am performing load test on JMeter for webbased application, and i have to get CPU Utilization, Memory Utilization, number of Threds. For this i am using VisualVM. Is there any way we can get as Report in the form of XLS or CSV or any other format we can give to the Customer. Could you pleasee help me on this or otherwise is there any other Performance tool we can get CPU,Memory utilization? -- Thanks, Raghu.ch, 回答1: You can use Tracer plugin with various probes. Tracer can export data in

VisualVM Reporting

由 孤街醉人 提交于 2021-02-11 02:53:45
问题 I am performing load test on JMeter for webbased application, and i have to get CPU Utilization, Memory Utilization, number of Threds. For this i am using VisualVM. Is there any way we can get as Report in the form of XLS or CSV or any other format we can give to the Customer. Could you pleasee help me on this or otherwise is there any other Performance tool we can get CPU,Memory utilization? -- Thanks, Raghu.ch, 回答1: You can use Tracer plugin with various probes. Tracer can export data in

Eclipse : Getting Error as Could not find jar file while installing Plugin in Eclipse

由 笑着哭i 提交于 2021-02-09 05:42:48
问题 I was following this below website http://visualvm.java.net/eclipse-launcher.html for installing VisualVM into Eclipse Helios Version 3.6 , for this as mentioned i downloaded visualvm_launcher_u1_eclipse_36 and also under in Eclipse Menu Window --->Preferences ---> Installed JRE ---> Pointed JDK Path in JRE Settings C:\Program Files\Java\jdk1.6.0_27 But when i tried to install this VisualVM into Eclipse by Eclipse Menu ---> Install New Software --->Add -- >Archive option i am getting the

Auto save profiler snapshots in visualVM

由 橙三吉。 提交于 2021-01-28 01:58:07
问题 Is it possible to configure VisualVM to automatically save snapshots/history of every java application that is running for both the monitor and the profiler tabs? I have several applications that run on a nightly basis, and I would like to collect the profiler and the monitor information about them from VisualVM for additional evaluation the morning after they run. I tried to find some plugins to VisualVM, and also tried to find a way to configure it in eclipse and use it in JUnits, but I
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