<!DOCTYPE html>
<!-- [if IE 8]><html class="no - js lt - ie9" lang="en" > <![endif] -->
<!-- [if gt IE 8]><! --> < html class = "no-js" lang = "en" > <!-- <![endif] -->
< head >
< meta charset = "utf-8" >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" >
< title > jvm — Arthas 3.1.0 documentation< / title >
< link rel = "shortcut icon" href = "_static/favicon.ico" / >
< link rel = "stylesheet" href = "_static/css/theme.css" type = "text/css" / >
< link rel = "stylesheet" href = "_static/pygments.css" type = "text/css" / >
< link rel = "stylesheet" href = "_static/overrides.css" type = "text/css" / >
< link rel = "index" title = "Index" href = "genindex.html" / >
< link rel = "search" title = "Search" href = "search.html" / >
< link rel = "next" title = "sysprop" href = "sysprop.html" / >
< link rel = "prev" title = "thread" href = "thread.html" / >
< script src = "_static/center_page.js" > < / script >
< link rel = "stylesheet" href = "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/github.min.css" >
< script src = "_static/js/modernizr.min.js" > < / script >
< / head >
< body class = "wy-body-for-nav" >
< div class = "wy-grid-for-nav" >
< nav data-toggle = "wy-nav-shift" class = "wy-nav-side" >
< div class = "wy-side-scroll" >
< div class = "wy-side-nav-search" >
< a href = "index.html" class = "icon icon-home" > Arthas
< / a >
< div class = "version" >
3.1.0
< / div >
< div role = "search" >
< form id = "rtd-search-form" class = "wy-form" action = "search.html" method = "get" >
< input type = "text" name = "q" placeholder = "Search docs" / >
< input type = "hidden" name = "check_keywords" value = "yes" / >
< input type = "hidden" name = "area" value = "default" / >
< / form >
< / div >
< / div >
< div class = "wy-menu wy-menu-vertical" data-spy = "affix" role = "navigation" aria-label = "main navigation" >
< ul class = "current" >
< li class = "toctree-l1" > < a class = "reference external" href = "https://alibaba.github.io/arthas/arthas-tutorials?language=en" > Online tutorials(Recommend)< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "install-detail.html" > Installation< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "quick-start.html" > Quick start< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "advanced-use.html" > Advanced usage< / a > < / li >
< li class = "toctree-l1 current" > < a class = "reference internal" href = "commands.html" > Commands< / a > < ul class = "current" >
< li class = "toctree-l2" > < a class = "reference internal" href = "dashboard.html" > dashboard< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "thread.html" > thread< / a > < / li >
< li class = "toctree-l2 current" > < a class = "current reference internal" href = "#" > jvm< / a > < ul >
< li class = "toctree-l3" > < a class = "reference internal" href = "#usage" > Usage< / a > < / li >
< li class = "toctree-l3" > < a class = "reference internal" href = "#thread-related" > Thread related< / a > < / li >
< li class = "toctree-l3" > < a class = "reference internal" href = "#file-descriptor-related" > File descriptor related< / a > < / li >
< / ul >
< / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "sysprop.html" > sysprop< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "sysenv.html" > sysenv< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "getstatic.html" > getstatic< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "ognl.html" > ognl< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "sc.html" > sc< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "sm.html" > sm< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "dump.html" > dump< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "jad.html" > jad< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "classloader.html" > classloader< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "mc.html" > mc< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "redefine.html" > redefine< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "monitor.html" > monitor< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "watch.html" > watch< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "trace.html" > trace< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "stack.html" > stack< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "tt.html" > tt< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "cat.html" > cat< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "pwd.html" > pwd< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "options.html" > options< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "commands.html#basic-arthas-commands" > Basic Arthas Commands< / a > < / li >
< / ul >
< / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "docker.html" > Docker< / a > < / li >
< li class = "toctree-l1" > < a class = "reference external" href = "https://github.com/alibaba/arthas/issues?q=label%3Auser-case" > User cases< / a > < / li >
< li class = "toctree-l1" > < a class = "reference external" href = "https://github.com/alibaba/arthas/issues?q=label%3Aquestion-answered" > Questions and answers< / a > < / li >
< li class = "toctree-l1" > < a class = "reference external" href = "https://github.com/alibaba/arthas" > Fork me at GitHub< / a > < / li >
< li class = "toctree-l1" > < a class = "reference external" href = "https://github.com/alibaba/arthas/blob/master/CONTRIBUTING.md" > CONTRIBUTING< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "release-notes.html" > Release Notes< / a > < / li >
< / ul >
< / div >
< / div >
< / nav >
< section data-toggle = "wy-nav-shift" class = "wy-nav-content-wrap" >
< nav class = "wy-nav-top" aria-label = "top navigation" >
< i data-toggle = "wy-nav-top" class = "fa fa-bars" > < / i >
< a href = "index.html" > Arthas< / a >
< / nav >
< div class = "wy-nav-content" >
< div class = "rst-content" >
< div role = "navigation" aria-label = "breadcrumbs navigation" >
< ul class = "wy-breadcrumbs" >
< li > < a href = "index.html" > Docs< / a > » < / li >
< li > < a href = "commands.html" > All Commands< / a > » < / li >
< li > jvm< / li >
< li class = "wy-breadcrumbs-aside" >
< a href = "https://github.com/alibaba/arthas/blob/master/site/src/site/sphinx/en/jvm.md" class = "fa fa-github" > Edit on GitHub< / a >
< / li >
< / ul >
< hr / >
< / div >
< div role = "main" class = "document" itemscope = "itemscope" itemtype = "http://schema.org/Article" >
< div itemprop = "articleBody" >
< div class = "section" id = "jvm" >
< span id = "jvm" > < / span > < h1 > jvm< a class = "headerlink" href = "#jvm" title = "Permalink to this headline" > ¶< / a > < / h1 >
< blockquote >
< div > Check the current JVM’ < / div > < / blockquote >
< div class = "section" id = "usage" >
< span id = "usage" > < / span > < h2 > Usage< a class = "headerlink" href = "#usage" title = "Permalink to this headline" > ¶< / a > < / h2 >
< div class = "highlight-default notranslate" > < pre class = "literal-block" > $ jvm
CATEGORY INFO
------------------------------------------------------------------------------------------------------------------------------------
RUNTIME MACHINE-NAME hellodeMacBook-Air.local
JVM-START-TIME 2015-12-23 10:54:18
MANAGEMENT-SPEC-VERSION 1.2
SPEC-NAME Java Virtual Machine Specification
SPEC-VENDOR Oracle Corporation
SPEC-VERSION 1.8
VM-NAME Java HotSpot(TM) 64-Bit Server VM
VM-VENDOR Oracle Corporation
VM-VERSION 25.60-b23
INPUT-ARGUMENTS -Xbootclasspath/a:/Users/hello/.jenv/versions/1.8/lib/tools.jar
-Djava.util.logging.config.file=/Users/hello/code/java/crash/packaging/target/
conf/logging.properties
CLASS-PATH /Users/hello/.jenv/versions/1.8/lib/tools.jar:/Users/hello/code/java/cras
h/packaging/target/bin/crash.cli-1.3.2-SNAPSHOT.jar::/Users/hello/code/java/cr
ash/packaging/target/lib/bcpkix-jdk15on-1.51.jar:/Users/hello/code/java/crash/
packaging/target/lib/bcprov-jdk15on-1.51.jar:/Users/hello/code/java/crash/pack
aging/target/lib/crash.connectors.ssh-1.3.2-SNAPSHOT-standalone.jar:/Users/hengyuna
bc/code/java/crash/packaging/target/lib/crash.connectors.telnet-1.3.2-SNAPSHOT-stan
dalone.jar:/Users/hello/code/java/crash/packaging/target/lib/crash.shell-1.3.2
-SNAPSHOT.jar:/Users/hello/code/java/crash/packaging/target/lib/groovy-all-1.8
.9.jar:/Users/hello/code/java/crash/packaging/target/lib/ivy-2.2.0.jar
BOOT-CLASS-PATH /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/resources.j
ar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/rt.jar:/
Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/sunrsasign.j
ar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jsse.jar
:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jce.jar:/L
ibrary/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/charsets.jar:
/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jfr.jar:/Li
brary/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/classes:/Users/hen
gyunabc/.jenv/versions/1.8/lib/tools.jar
LIBRARY-PATH /Users/hello/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library
/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
CLASS-LOADING LOADED-CLASS-COUNT 4264
TOTAL-LOADED-CLASS-COUNT 4264
UNLOADED-CLASS-COUNT 0
IS-VERBOSE false
COMPILATION NAME HotSpot 64-Bit Tiered Compilers
TOTAL-COMPILE-TIME 5145(ms)
GARBAGE-COLLECTORS PS Scavenge 6/74(ms)
[count/time]
PS MarkSweep 1/64(ms)
[count/time]
MEMORY-MANAGERS CodeCacheManager Code Cache
Metaspace Manager Metaspace
Compressed Class Space
PS Scavenge PS Eden Space
PS Survivor Space
PS MarkSweep PS Eden Space
PS Survivor Space
PS Old Gen
MEMORY HEAP-MEMORY-USAGE 186646528/134217728/1908932608/31245568
[committed/init/max/used]
NO-HEAP-MEMORY-USAGE 35520512/2555904/-1/34584616
[committed/init/max/used]
PENDING-FINALIZE-COUNT 0
OPERATING-SYSTEM OS Mac OS X
ARCH x86_64
PROCESSORS-COUNT 4
LOAD-AVERAGE 2.328125
VERSION 10.10.5
THREAD COUNT 16
DAEMON-COUNT 10
PEAK-COUNT 18
STARTED-COUNT 19
DEADLOCK-COUNT 0
FILE-DESCRIPTOR
MAX-FILE-DESCRIPTOR-COUNT 10240
OPEN-FILE-DESCRIPTOR-COUNT 648
Affect cost in 2 ms.< / pre >
< / div >
< / div >
< div class = "section" id = "thread-related" >
< span id = "thread-related" > < / span > < h2 > Thread related< a class = "headerlink" href = "#thread-related" title = "Permalink to this headline" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > COUNT: the count of active threads< / li >
< li > DAEMON-COUNT: the count of active daemon threads< / li >
< li > PEAK-COUNT: the maximum count of the live threads since JVM starts< / li >
< li > STARTED-COUNT: the total count of the created threads since JVM starts< / li >
< li > DEADLOCK-COUNT: the count of deadlocked threads< / li >
< / ul >
< / div >
< div class = "section" id = "file-descriptor-related" >
< span id = "file-descriptor-related" > < / span > < h2 > File descriptor related< a class = "headerlink" href = "#file-descriptor-related" title = "Permalink to this headline" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > MAX-FILE-DESCRIPTOR-COUNT： < / li >
< li > OPEN-FILE-DESCRIPTOR-COUNT： < / li >
< / ul >
< / div >
< / div >
< / div >
< / div >
< footer >
< div class = "rst-footer-buttons" role = "navigation" aria-label = "footer navigation" >
< a href = "sysprop.html" class = "btn btn-neutral float-right" title = "sysprop" accesskey = "n" rel = "next" > Next < span class = "fa fa-arrow-circle-right" > < / span > < / a >
< a href = "thread.html" class = "btn btn-neutral" title = "thread" accesskey = "p" rel = "prev" > < span class = "fa fa-arrow-circle-left" > < / span > Previous< / a >
< / div >
< hr / >
< div role = "contentinfo" >
< p >
© Copyright 2018, Alibaba Middleware Group, and contributors.
< / p >
< / div >
Built with < a href = "http://sphinx-doc.org/" > Sphinx< / a > using a < a href = "https://github.com/rtfd/sphinx_rtd_theme" > theme< / a > provided by < a href = "https://readthedocs.org" > Read the Docs< / a > .
< / footer >
< / div >
< / div >
< / section >
< / div >
< script type = "text/javascript" >
var DOCUMENTATION_OPTIONS = {
URL_ROOT:'./',
VERSION:'3.1.0',
LANGUAGE:'en',
COLLAPSE_INDEX:false,
FILE_SUFFIX:'.html',
HAS_SOURCE: true,
SOURCELINK_SUFFIX: '.txt'
};
< / script >
< script type = "text/javascript" src = "_static/jquery.js" > < / script >
< script type = "text/javascript" src = "_static/underscore.js" > < / script >
< script type = "text/javascript" src = "_static/doctools.js" > < / script >
< script type = "text/javascript" src = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML" > < / script >
< script type = "text/javascript" src = "_static/js/theme.js" > < / script >
< script type = "text/javascript" >
jQuery(function () {
SphinxRtdTheme.Navigation.enable(true);
});
< / script >
< div class = "github-fork-ribbon-wrapper right" >
< div class = "github-fork-ribbon" >
< a href = "https://github.com/alibaba/arthas" target = "_blank" > Fork me at GitHub< / a >
< / div >
< / div >
< script type = "text/javascript" src = "_static/add_badges.js" > < / script >
< script src = "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js" > < / script >
< script src = "https://cdnjs.cloudflare.com/ajax/libs/highlightjs-line-numbers.js/2.5.0/highlightjs-line-numbers.min.js" > < / script >
< script >
document.querySelectorAll('div.hljs > pre').forEach(function(block) {
hljs.highlightBlock(block);
hljs.lineNumbersBlock(block);
});
< / script >
< script >
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "https://hm.baidu.com/hm.js?d5c5e25b100f0eb51a4c35c8a86ea9b4";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
< / script >
< / body >
< / html >
