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data-v-2b64a081><!--[--><!--]--></div></div></div><div data-v-fdd717e0><h1 id="jvm" tabindex="-1"><a class="header-anchor" href="#jvm" aria-hidden="true">#</a> jvm</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials.html?language=cn&amp;id=command-jvm" target="_blank" rel="noopener noreferrer"><code>jvm</code>在线教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span></a></p><div class="custom-container tip"><p class="custom-container-title">提示</p><p>查看当前 JVM 信息</p></div><h2 id="使用参考" tabindex="-1"><a class="header-anchor" href="#使用参考" aria-hidden="true">#</a> 使用参考</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ jvm
RUNTIME
--------------------------------------------------------------------------------------------------------------
MACHINE-NAME 37@ff267334bb65
JVM-START-TIME 2020-07-23 07:50:36
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 25.201-b09
INPUT-ARGUMENTS []
CLASS-PATH demo-arthas-spring-boot.jar
BOOT-CLASS-PATH /usr/lib/jvm/java-8-oracle/jre/lib/resources.jar:/usr/lib/jvm/java-8-oracle/j
re/lib/rt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/sunrsasign.jar:/usr/lib/jvm/
java-8-oracle/jre/lib/jsse.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jce.jar:/us
r/lib/jvm/java-8-oracle/jre/lib/charsets.jar:/usr/lib/jvm/java-8-oracle/jre/l
ib/jfr.jar:/usr/lib/jvm/java-8-oracle/jre/classes
LIBRARY-PATH /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
--------------------------------------------------------------------------------------------------------------
CLASS-LOADING
--------------------------------------------------------------------------------------------------------------
LOADED-CLASS-COUNT 7529
TOTAL-LOADED-CLASS-COUNT 7529
UNLOADED-CLASS-COUNT 0
IS-VERBOSE false
--------------------------------------------------------------------------------------------------------------
COMPILATION
--------------------------------------------------------------------------------------------------------------
NAME HotSpot 64-Bit Tiered Compilers
TOTAL-COMPILE-TIME 14921(ms)
--------------------------------------------------------------------------------------------------------------
GARBAGE-COLLECTORS
--------------------------------------------------------------------------------------------------------------
PS Scavenge name : PS Scavenge
[count/time (ms)] collectionCount : 7
collectionTime : 68
PS MarkSweep name : PS MarkSweep
[count/time (ms)] collectionCount : 1
collectionTime : 47
--------------------------------------------------------------------------------------------------------------
MEMORY-MANAGERS
--------------------------------------------------------------------------------------------------------------
CodeCacheManager Code Cache
Metaspace Manager Metaspace
Compressed Class Space
Copy Eden Space
Survivor Space
MarkSweepCompact Eden Space
Survivor Space
Tenured Gen
--------------------------------------------------------------------------------------------------------------
MEMORY
--------------------------------------------------------------------------------------------------------------
HEAP-MEMORY-USAGE init : 268435456(256.0 MiB)
[memory in bytes] used : 18039504(17.2 MiB)
committed : 181403648(173.0 MiB)
max : 3817865216(3.6 GiB)
NO-HEAP-MEMORY-USAGE init : 2555904(2.4 MiB)
[memory in bytes] used : 33926216(32.4 MiB)
committed : 35176448(33.5 MiB)
max : -1(-1 B)
--------------------------------------------------------------------------------------------------------------
OPERATING-SYSTEM
--------------------------------------------------------------------------------------------------------------
OS Linux
ARCH amd64
PROCESSORS-COUNT 3
LOAD-AVERAGE 29.53
VERSION 4.15.0-52-generic
--------------------------------------------------------------------------------------------------------------
THREAD
--------------------------------------------------------------------------------------------------------------
COUNT 30
DAEMON-COUNT 24
PEAK-COUNT 31
STARTED-COUNT 36
DEADLOCK-COUNT 0
--------------------------------------------------------------------------------------------------------------
FILE-DESCRIPTOR
--------------------------------------------------------------------------------------------------------------
MAX-FILE-DESCRIPTOR-COUNT 1048576
OPEN-FILE-DESCRIPTOR-COUNT 100
Affect(row-cnt:0) cost in 88 ms.
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="thread-相关" tabindex="-1"><a class="header-anchor" href="#thread-相关" aria-hidden="true">#</a> THREAD 相关</h2><ul><li>COUNT: JVM 当前活跃的线程数</li><li>DAEMON-COUNT: JVM 当前活跃的守护线程数</li><li>PEAK-COUNT: 从 JVM 启动开始曾经活着的最大线程数</li><li>STARTED-COUNT: 从 JVM 启动开始总共启动过的线程次数</li><li>DEADLOCK-COUNT: JVM 当前死锁的线程数</li></ul><h2 id="文件描述符相关" tabindex="-1"><a class="header-anchor" href="#文件描述符相关" aria-hidden="true">#</a> 文件描述符相关</h2><ul><li>MAX-FILE-DESCRIPTOR-COUNT：JVM 进程最大可以打开的文件描述符数</li><li>OPEN-FILE-DESCRIPTOR-COUNT：JVM 当前打开的文件描述符数</li></ul></div><!--[--><!--]--></div><footer class="page-meta right-menu-padding" data-v-fdd717e0><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/alibaba/arthas/edit/master/site/docs/doc/jvm.md" rel="noopener noreferrer" target="_blank" aria-label="在 GitHub 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