JVM_10_JDK命令行工具

名称

主要作用

jps

显示指定系统内所有的HotSpot虚拟机进程(Java程序 进程号)

jstack

用于收集HotSpot虚拟机各方面的运行数据

jinfo

显示虚拟机配置信息

jmap

生成虚拟机的内存存储快照

jhat

用于分析heapdump文件，它会建立一个HTTP/HTML服务器，让用户在浏览器上查看分析结果

jstack

显示虚拟机的线程快照

jps

列出正在运行的程序的主类函数名和进程号

jps -q

列出正在运行的进程号

jps -m

输出进程启动时传递给主类mian()函数的 参数

jps -v

输出虚拟机进程启动时JVM参数

jps  -l

输出主类的全类名，如果进程执行的是jar包，输出jar包路径

-class

监视装载类，卸载空间，总空间以及类装载所耗费的时间

-gc

监视Java堆状况(Eden区/survivor区/年老代/永久代等的容量，已用空间，GC时间合计)

-gccapacity

监视内容与-gc基本相同，但输出主要关注Java堆各个区域使用到的最大，最小空间

-gcutil

监视内容与-gc基本相同，但输出主要关注已使用空间占总空间的百分比

-gccause

与-gcutil功能一样，但是会额外输出"导致上一次GC产生的原因"

-gcnew

监视新生代GC状况

-gcnewcapacity

监视内容与-gcnew基本相同，输出主要关注使用到的最大，最小空间

-gcold

监视年老代GC状况

-gcoldcapacity

监视内容与-gcold基本相同，输出主要关注使用到的最大，最小空间

-gcpermcapacity

输出永久代使用到的最大，最小空间

-compiler

输出JIT编译器编译过得方法，耗时等信息

-printcompilation

输出已经被JIT编译的方法

S0C

Survivor0、年轻代中第一个survivor的容量

S1C

Survivor1、年轻代中第二个survivor的容量

S0U

年轻代中第一个survivor目前已使用的空间

S1U

年轻代中第二个survivor目前已使用的空间

EC

年轻代中Eden的容量

EU

年轻代中Eden目前已使用的空间

OC

年老代容量

OU

年老代已经使用的空间

MC

方法区大小

MU

方法区已使用大小

CCSC

压缩类空间大小

CCSU

压缩类空间已使用大小

YGC

年轻代中GC的次数

YGCT

年轻代中GC消耗的时间

FGC

年老代GC的次数

FGCT

年老代GC消耗的时间

GCT

GC消耗总时间

([email protected])[[email protected] ~]# jinfo 2564

Attaching to process ID 2564, please wait...

Debugger attached successfully.

Server compiler detected.

JVM version is 25.60-b23

Java System Properties:

java.runtime.name = Java(TM) SE Runtime Environment

java.vm.version = 25.60-b23

sun.boot.library.path = /opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/amd64

java.vendor.url = http://java.oracle.com/

java.vm.vendor = Oracle Corporation

path.separator = :

file.encoding.pkg = sun.io

java.vm.name = Java HotSpot(TM) 64-Bit Server VM

sun.os.patch.level = unknown

sun.java.launcher = SUN_STANDARD

user.country = US

user.dir = /home/stars/TaskMaster/bin

java.vm.specification.name = Java Virtual Machine Specification

java.runtime.version = 1.8.0_60-b27

java.awt.graphicsenv = sun.awt.X11GraphicsEnvironment

os.arch = amd64

java.endorsed.dirs = /opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/endorsed

java.io.tmpdir = /tmp

line.separator =

java.vm.specification.vendor = Oracle Corporation

os.name = Linux

sun.jnu.encoding = UTF-8

java.library.path = /opt/FUDE-1.0/fude/lib:/opt/FUDE-1.0/utils/lib:/opt/FUDE-1.0/log/lib:/opt/FUDE-1.0/netsnmp/lib:/opt/FUDE-1.0/omni/lib:/opt/FUDE-1.0/python/lib:/opt/FUDE-1.0/boost/lib:/opt/FUDE-1.0/cppunit/lib:/opt/FUDE-1.0/TAO/ACE_wrappers/lib::/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

java.specification.name = Java Platform API Specification

java.class.version = 52.0

sun.management.compiler = HotSpot 64-Bit Tiered Compilers

os.version = 2.6.32-279.el6.x86_64

user.home = /root

user.timezone = Asia/Shanghai

java.awt.printerjob = sun.print.PSPrinterJob

file.encoding = UTF-8

java.specification.version = 1.8

user.name = root

java.class.path = ../lib/dom4j-1.6.1.jar:../lib/jackson-annotations-2.2.3.jar:../lib/postgresql-9.3-1102.jdbc4.jar:../lib/commons-collections-3.2.1.jar:../lib/jackson-core-asl-1.9.13.jar:../lib/licclient.jar:../lib/json-lib-2.2.3-jdk15.jar:../lib/RuleCenterServerAPI-0.9.1.jar:../lib/commons-lang-2.4.jar:../lib/ezmorph-1.0.4.jar:../lib/proxy-server-client-1.1.0.jar:../lib/jackson-jaxrs-1.9.13.jar:../lib/jackson-mapper-asl-1.9.13.jar:../lib/jackson-xc-1.9.13.jar:../lib/RBSPAdapter2.jar:../lib/mongo-2.9.1.jar:../lib/jdom.jar:../lib/jackson-core-2.2.3.jar:../lib/taskcenter.jar:../lib/commons-beanutils-1.8.2.jar:../lib/PCI2.jar:../lib/commons-io-1.4.jar:../lib/ojdbc6.jar:../lib/slf4j-api-1.6.1.jar:../lib/zookeeper-3.4.5.jar:../lib/cxfClient.jar:../lib/commons-logging-1.1.1.jar:../lib/libthrift-0.7.0.jar:../lib/slf4j-log4j12-1.6.6.jar:../lib/whois_client_2.3.0_jre1.6.jar:../lib/log4j-1.2.15.jar:../lib/jackson-databind-2.2.3.jar:../lib/starskeeper-1.1.1.jar:../lib/axis2lib/axiom-dom-1.2.13.jar:../lib/axis2lib/axis2-transport-http-1.6.2.jar:../lib/axis2lib/jibx-bind-1.2.jar:../lib/axis2lib/axis2-ant-plugin-1.6.2.jar:../lib/axis2lib/commons-httpclient-3.1.jar:../lib/axis2lib/httpcore-4.0.jar:../lib/axis2lib/commons-codec-1.3.jar:../lib/axis2lib/regexp-1.2.jar:../lib/axis2lib/commons-fileupload-1.2.jar:../lib/axis2lib/bcel-5.1.jar:../lib/axis2lib/jibx-run-1.2.jar:../lib/axis2lib/geronimo-stax-api_1.0_spec-1.0.1.jar:../lib/axis2lib/axis2-soapmonitor-servlet-1.6.2.jar:../lib/axis2lib/axis2-java2wsdl-1.6.2.jar:../lib/axis2lib/axis2-corba-1.6.2.jar:../lib/axis2lib/geronimo-ws-metadata_2.0_spec-1.1.2.jar:../lib/axis2lib/jalopy-1.5rc3.jar:../lib/axis2lib/jaxb-api-2.1.jar:../lib/axis2lib/xmlbeans-2.3.0.jar:../lib/axis2lib/wstx-asl-3.2.9.jar:../lib/axis2lib/axis2-json-1.6.2.jar:../lib/axis2lib/axiom-impl-1.2.13.jar:../lib/axis2lib/axis2-clustering-1.6.2.jar:../lib/axis2lib/woden-api-1.0M9.jar:../lib/axis2lib/geronimo-saaj_1.3_spec-1.0.1.jar:../lib/axis2lib/geronimo-jta_1.1_spec-1.1.jar:../lib/axis2lib/apache-mime4j-core-0.7.2.jar:../lib/axis2lib/mail-1.4.jar:../lib/axis2lib/mex-1.6.2-impl.jar:../lib/axis2lib/axis2-fastinfoset-1.6.2.jar:../lib/axis2lib/jaxws-tools-2.1.3.jar:../lib/axis2lib/tribes-6.0.16.jar:../lib/axis2lib/axis2-xmlbeans-1.6.2.jar:../lib/axis2lib/geronimo-jaxws_2.2_spec-1.0.jar:../lib/axis2lib/axis2-jaxbri-1.6.2.jar:../lib/axis2lib/axis2-saaj-1.6.2.jar:../lib/axis2lib/antlr-2.7.7.jar:../lib/axis2lib/axis2-jaxws-1.6.2.jar:../lib/axis2lib/axis2-jibx-1.6.2.jar:../lib/axis2lib/neethi-3.0.2.jar:../lib/axis2lib/commons-io-1.4.jar:../lib/axis2lib/axis2-metadata-1.6.2.jar:../lib/axis2lib/xml-resolver-1.2.jar:../lib/axis2lib/XmlSchema-1.4.7.jar:../lib/axis2lib/axiom-api-1.2.13.jar:../lib/axis2lib/activation-1.1.jar:../lib/axis2lib/commons-logging-1.1.1.jar:../lib/axis2lib/woden-impl-dom-1.0M9.jar:../lib/axis2lib/axis2-adb-codegen-1.6.2.jar:../lib/axis2lib/axis2-adb-1.6.2.jar:../lib/axis2lib/xalan-2.7.0.jar:../lib/axis2lib/commons-cli-1.2.jar:../lib/axis2lib/jettison-1.0-RC2.jar:../lib/axis2lib/woden-impl-commons-1.0M9.jar:../lib/axis2lib/jaxb-impl-2.1.7.jar:../lib/axis2lib/axis2-transport-local-1.6.2.jar:../lib/axis2lib/log4j-1.2.15.jar:../lib/axis2lib/axis2-codegen-1.6.2.jar:../lib/axis2lib/axis2-kernel-1.6.2.jar:../lib/axis2lib/jaxb-xjc-2.1.7.jar:../lib/axis2lib/axis2-spring-1.6.2.jar:../lib/axis2lib/wsdl4j-1.6.2.jar:../lib/axis2lib/axis2-mtompolicy-1.6.2.jar:../lib/axis2lib/geronimo-annotation_1.0_spec-1.1.jar:../lib/axis2lib/jaxen-1.1.1.jar:../lib/axis2lib/jsr311-api-1.0.jar:../lib/axis2lib/juli-6.0.16.jar:../lib/redis/messageservice.jar:../lib/redis/jedis-2.6.2.jar:../lib/redis/commons-pool2-2.3.jar:../bin/*:../conf

java.vm.specification.version = 1.8

sun.arch.data.model = 64

sun.java.command = com.taskcenter.taskmaster.TaskMaster

java.home = /opt/FUDE-1.0/java/jdk1.8.0_60/jre

user.language = en

java.specification.vendor = Oracle Corporation

awt.toolkit = sun.awt.X11.XToolkit

java.vm.info = mixed mode

java.version = 1.8.0_60

java.ext.dirs = /opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/ext:/usr/java/packages/lib/ext

sun.boot.class.path = /opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/resources.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/rt.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/sunrsasign.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/jsse.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/jce.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/charsets.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/lib/jfr.jar:/opt/FUDE-1.0/java/jdk1.8.0_60/jre/classes

java.vendor = Oracle Corporation

file.separator = /

java.vendor.url.bug = http://bugreport.sun.com/bugreport/

sun.io.unicode.encoding = UnicodeLittle

sun.cpu.endian = little

sun.cpu.isalist =

VM Flags:

Non-default VM flags: -XX:CICompilerCount=3 -XX:InitialHeapSize=1073741824 -XX:MaxHeapSize=1073741824 -XX:MaxNewSize=357564416 -XX:MinHeapDeltaBytes=524288 -XX:NewSize=357564416 -XX:OldSize=716177408 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseFastUnorderedTimeStamps -XX:+UseParallelGC

Command line:  -Dfile.encoding=UTF-8 -Xms1024m -Xmx1024m

-dump

生成Java堆转存储快照。格式：-dump[:live] format=b,file=filepath+filename  pid

其中live为选填(说明是否只dump出存活的对象)

-finalizeinfo

显示在F-Queue中等待Finalizer线程执行finalize方法的对象。(windows下无效)

-heap

显示Java堆详细信息，如使用哪种回收器，参数配置，分代情况等(windows下无效)

-histo

显示堆中对象统计信息，包括类，实例数量，合计容量

-permstat

已ClassLoader为统计口径显示永久代内存状态(windows下无效)

-F

当虚拟机进程对-dump选项没有响应时，可使用这个选项强制生成dump快照(windows下无效)

-F

当正常输出的请求不被响应时，强制输出线程堆栈

-l

除堆栈外，显示关于锁的附加信息

-m

如果调用到本地方法的话，可以显示C/C++的堆栈