VisualVM

Jetbrain好用的插件（经验总结） 笔者使用过idea，phpstorm，webstorm，pycharm和goland开发过项目，不得不说，Jetbrains的编辑器每一款都挺好用的，而且快捷键通用，对于全栈开发很需要这样，不然每个IDE都不一样，用起来很别扭。非要挑毛病的话，可能就是内存占用大啊，不如sublime，atom或者vscode轻量这样类似的论调吧，暂且不谈（毕竟这话题一直是程序员互撕的话题之一）。 本文列举了java开发和php开发中，笔者使用的IDE插件： IDEA插件汇总： Alibaba Java Coding (扫描代码规范) CheckStyle-IDEA (代码规范检查) SonarLint(潜在Bug检查和代码规范检查) FindBugs-IDEA (潜在Bug检查和代码规范检查) tasks (代码任务列表，相当于memo) maven helper (解决依赖冲突) Key promoter X(当鼠标点击功能时，快捷键提示) MetricsReloaded (代码复杂度检查) Statistic (代码统计) CodeGlance (在编辑代码最右侧，显示一块代码小地图) GsonFormat (把 JSON 字符串直接实例化成类) CamelCase (驼峰式命名和下划线命名交替变化) Background Image Plus

I'm trying to connect jvisualvm installed with jdk1.7.0_04 to a locally running java process. When I do this, jvisualvm shows a progress bar in the bottom left saying its connecting to the process, and then never responds again. The java process I'm trying to connect to is still fine and works as normal. I can get a threaddump of visualvm using jstack, that shows 1 blocked thread. AWT-EventQueue-0" prio=6 tid=0x04a1a000 nid=0x1110 waiting for monitor entry [0x062af000] java.lang.Thread.State: BLOCKED (on object monitor) at com.sun.tools.visualvm.core.model.ModelFactory.getModel(ModelFactory

I've been searching all over for a consistent and clear explanation of what 'self time' actually refers to in the VisualVM context and how does it differ to 'self time (cpu)'. Also does 'self time [%]' refer to self time or self time cpu. There doesn't appear to be much documentation on this or at least I haven't found it. So any thoughts/input will be appreciated. Tomas Hurka Self Time is a wall-clock time spent in the method itself ( includes time waiting/sleeping ). Self Time (CPU) is a time processor time , so it does NOT include time spent waiting, sleeping , etc. Both columns do NOT

In Java VisualVM, is there any way to display total method time, rather than "self time"? (The latter is not particularly useful, since it doesn't tell you anything about how much time methods actually take to run.) If not, is there any standalone free Java profiler that does calculate total method time? Looking at the trace data in a "snapshot" view allows you to see the total as well as the self time. Press the "snapshot" button that appears about the table of results. This will create a new tab that contains a "Call Tree" view which breaks down the self vs. total time. The "combined" view

I would like to profile an application that runs on Tomcat with the VisualVM tool. Unfortunately, when I tell VisualVM to profile Tomcat, Tomcat prints out a couple of messages indicating it is connecting to a profile tool and then simply exits. Details… I am using Windows XP, Tomcat 6, VisualVM 1.2.1, and JDK 1.6.0_11. In Visual VM, I right-click on the Tomcat Application and select “Profile” In the Profiler Tab, I press the Memory button (or the CPU button). Tomcat exits Note that if I right-click on the Tomcat Application and select “Heap Dump” that seems to work OK. rwsimmo I have VisualVM

距离上次介绍Jconsole已经时隔两周了，这期间由于工作中要用go来做一个新项目，所以精力都用在入门go上了，不过发现go语言用起来真的挺不错的，比python感觉还好点，大家没事可以了解下。 言归正传，VisualVM和Jconsole同是图形化的jvm监控和分析工具，两者在一些基本功能上的使用大同小异，比如内存、线程、jvm环境参数等，但是相对而言VisualVM的功能要稍强于Jconsole，相当于加强版的Jconsole。同是visualVM的一些高级功能是通过安装插件来拓展，所以更能因需定制。先看下起始页： 由于VisualVM官方已经提供了很完善的使用文档（同样是亲儿子，Jconsole的文档就有点寒掺了，而且VisualVM有一部分竟然有中文版），所以这里就不做详细介绍，只重点看一下的VisualVM两个方面： 插件安装 程序性能分析 一、VisualVM插件安装 这个其实没什么好介绍的，基本上看图就明白了。插件可以进行手工安装，可以再插件中心下载*.nbm，在选项“工具—插件—已下载”中选择安装，但是作为一款 便捷的 图形化工具，这样做无意有点费事，其实在" 工具—插件 "中我们可以直接管理已安装插件，并选择下载安装需要的新插件。看图： 可以看到VisualVM提供了很丰富的插件，我们只要选中需要插件，点击安装即可（当然，前提是你待联网了）。好了，就是这么简单。

As far as i can tell, you can only profile a running application using VisualVM . Does anyone know of a way to profile the launch and startup of a java application using VisualVM? I'm convinced there must be a way, otherwise it would be a major oversight. Hoping I've just misread the documentation. Thanks, p. Are you setting up the profiling using the `-Xrunjdwp" command-line option? If so, that option has a "suspend" parameter for just this purpose: True if the target VM is to be suspended immediately before the main class is loaded; false otherwise. Example from my own config: -Xrunjdwp