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Java 几个有用的命令 - All Options, Memory Options, GC Options, System Properties, Thread Dump, Heap Dump
- jcmd ##Refer to http://www.cnblogs.com/tang88seng/p/4497725.html
- java -XX:+PrintFlagsFinal -version ##Display all JVM options
- java -XX:+PrintCommandLineFlags -version ##Display default JVM Memory and GC options
-XX:InitialHeapSize=134209344 -XX:MaxHeapSize=2147349504 -XX:+PrintCommandLineFlags -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:-UseLargePagesIndividualAllocation -XX:+UseParallelGC java version "1.8.0_60" Java(TM) SE Runtime Environment (build 1.8.0_60-b27) Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)
- java -XshowSettings ##Display system properties
java -XshowSettings VM settings: Max. Heap Size (Estimated): 1.05G Ergonomics Machine Class: server Using VM: Java HotSpot(TM) 64-Bit Server VM Property settings: awt.toolkit = sun.awt.X11.XToolkit file.encoding = UTF-8 file.encoding.pkg = sun.io file.separator = / java.awt.graphicsenv = sun.awt.X11GraphicsEnvironment java.awt.printerjob = sun.print.PSPrinterJob java.class.path = /XXXXX java.class.version = 51.0 java.endorsed.dirs = /ptc/Windchill_10.2/Java/jre/lib/endorsed java.ext.dirs = /ptc/Windchill_10.2/Java/jre/lib/ext /usr/java/packages/lib/ext java.home = /ptc/Windchill_10.2/Java/jre java.io.tmpdir = /tmp java.library.path = /usr/java/packages/lib/amd64 /usr/lib64 /lib64 /lib /usr/lib java.runtime.name = Java(TM) SE Runtime Environment java.runtime.version = 1.7.0_72-b14 java.specification.name = Java Platform API Specification java.specification.vendor = Oracle Corporation java.specification.version = 1.7 java.vendor = Oracle Corporation java.vendor.url = http://java.oracle.com/ java.vendor.url.bug = http://bugreport.sun.com/bugreport/ java.version = 1.7.0_72 java.vm.info = mixed mode java.vm.name = Java HotSpot(TM) 64-Bit Server VM java.vm.specification.name = Java Virtual Machine Specification java.vm.specification.vendor = Oracle Corporation java.vm.specification.version = 1.7 java.vm.vendor = Oracle Corporation java.vm.version = 24.72-b04 line.separator = \n os.arch = amd64 os.name = Linux os.version = 2.6.18-371.8.1.el5 path.separator = : sun.arch.data.model = 64 sun.boot.class.path = /ptc/Windchill_10.2/Java/jre/lib/resources.jar /ptc/Windchill_10.2/Java/jre/lib/rt.jar /ptc/Windchill_10.2/Java/jre/lib/sunrsasign.jar /ptc/Windchill_10.2/Java/jre/lib/jsse.jar /ptc/Windchill_10.2/Java/jre/lib/jce.jar /ptc/Windchill_10.2/Java/jre/lib/charsets.jar /ptc/Windchill_10.2/Java/jre/lib/jfr.jar /ptc/Windchill_10.2/Java/jre/classes sun.boot.library.path = /ptc/Windchill_10.2/Java/jre/lib/amd64 sun.cpu.endian = little sun.cpu.isalist = sun.desktop = gnome sun.io.unicode.encoding = UnicodeLittle sun.java.launcher = SUN_STANDARD sun.jnu.encoding = UTF-8 sun.management.compiler = HotSpot 64-Bit Tiered Compilers sun.os.patch.level = unknown user.country = US user.dir = /ptc/Windchill_10.2/Windchill/codebase/wt/workflow/expr user.home = /home/wcadmin user.language = en user.name = wcadmin user.timezone = Locale settings: default locale = English default display locale = English (United States) default format locale = English (United States) available locales = ar, ar_AE, ar_BH, ar_DZ, ar_EG, ar_IQ, ar_JO, ar_KW, ar_LB, ar_LY, ar_MA, ar_OM, ar_QA, ar_SA, ar_SD, ar_SY, ar_TN, ar_YE, be, be_BY, bg, bg_BG, ca, ca_ES, cs, cs_CZ, da, da_DK, de, de_AT, de_CH, de_DE, de_LU, el, el_CY, el_GR, en, en_AU, en_CA, en_GB, en_IE, en_IN, en_MT, en_NZ, en_PH, en_SG, en_US, en_ZA, es, es_AR, es_BO, es_CL, es_CO, es_CR, es_DO, es_EC, es_ES, es_GT, es_HN, es_MX, es_NI, es_PA, es_PE, es_PR, es_PY, es_SV, es_US, es_UY, es_VE, et, et_EE, fi, fi_FI, fr, fr_BE, fr_CA, fr_CH, fr_FR, fr_LU, ga, ga_IE, hi_IN, hr, hr_HR, hu, hu_HU, in, in_ID, is, is_IS, it, it_CH, it_IT, iw, iw_IL, ja, ja_JP, ja_JP_JP_#u-ca-japanese, ko, ko_KR, lt, lt_LT, lv, lv_LV, mk, mk_MK, ms, ms_MY, mt, mt_MT, nl, nl_BE, nl_NL, no, no_NO, no_NO_NY, pl, pl_PL, pt, pt_BR, pt_PT, ro, ro_RO, ru, ru_RU, sk, sk_SK, sl, sl_SI, sq, sq_AL, sr, sr_BA, sr_BA_#Latn, sr_CS, sr_ME, sr_ME_#Latn, sr_RS, sr_RS_#Latn, sr__#Latn, sv, sv_SE, th, th_TH, th_TH_TH_#u-nu-thai, tr, tr_TR, uk, uk_UA, vi, vi_VN, zh, zh_CN, zh_HK, zh_SG, zh_TW
Java 几个有用的命令 - All Options, Memory Options, GC Options, System Properties, Thread Dump, Heap Dump
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