jmap[options]pid jmap[options]executablecore jmap[options][pid]server-id@]remote-hostname-or-IP
C:UsersAdministrator>jmap9208 AttachingtoprocessID9208,pleasewait... Debuggerattachedsuccessfully. Servercompilerdetected. JVMversionis24.75-b04 0x00000000623c00008016KD:Javajdk1.7.0_75jrebinserverjvm.dll 0x0000000062ba0000840KD:Javajdk1.7.0_75jrebinmsvcr100.dll 0x0000000062cc0000144KD:Javajdk1.7.0_75jrebinsunec.dll 0x0000000062cf000068KD:Javajdk1.7.0_75jrebinnio.dll 0x0000000062d10000100KD:Javajdk1.7.0_75jrebinnet.dll 0x0000000062d30000160KD:Javajdk1.7.0_75jrebinjava.dll 0x00000000634d000084KD:Javajdk1.7.0_75jrebinzip.dll 0x000000006595000044KD:Javajdk1.7.0_75jrebinsunmscapi.dll 0x000000006596000060KD:Javajdk1.7.0_75jrebinverify.dll 0x000000006597000044KD:Javajdk1.7.0_75jrebinmanagement.dll ...
C:UsersAdministrator>jmap-dump:format=b,file=9208_0413.hprof9208 DumpingheaptoC:UsersAdministrator9208_0413.hprof... Heapdumpfilecreated
C:UsersAdministrator>jmap-finalizerinfo9208 AttachingtoprocessID9208,pleasewait... Debuggerattachedsuccessfully. Servercompilerdetected. JVMversionis24.75-b04 Numberofobjectspendingforfinalization:0
C:UsersAdministrator>jmap-heap9208 AttachingtoprocessID9208,pleasewait... Debuggerattachedsuccessfully. Servercompilerdetected. JVMversionis24.75-b04 usingthread-localobjectallocation. ParallelGCwith4thread(s) HeapConfiguration: MinHeapFreeRatio=0 MaxHeapFreeRatio=100 MaxHeapSize=2124414976(2026.0MB) NewSize=1310720(1.25MB) MaxNewSize=17592186044415MB OldSize=5439488(5.1875MB) NewRatio=2 SurvivorRatio=8 PermSize=21757952(20.75MB) MaxPermSize=85983232(82.0MB) G1HeapRegionSize=0(0.0MB) HeapUsage: PSYoungGeneration EdenSpace: capacity=68157440(65.0MB) used=16646688(15.875518798828125MB) free=51510752(49.124481201171875MB) 24.423875075120193%used FromSpace: capacity=5242880(5.0MB) used=5228248(4.986045837402344MB) free=14632(0.01395416259765625MB) 99.72091674804688%used ToSpace: capacity=15728640(15.0MB) used=0(0.0MB) free=15728640(15.0MB) 0.0%used PSOldGeneration capacity=88080384(84.0MB) used=27239848(25.977943420410156MB) free=60840536(58.022056579589844MB) 30.9261231195359%used PSPermGeneration capacity=22020096(21.0MB) used=15369592(14.657585144042969MB) free=6650504(6.342414855957031MB) 69.7980244954427%used 10057internedStringsoccupying867832bytes.
num#instances#bytesclassname ---------------------------------------------- ... 877:132[Lcom.sun.jndi.ldap.pool.Pool; 878:232com.sun.org.apache.xerces.internal.impl.dv.dtd.ENTITYDatatypeValidator 879:232java.lang.Shutdown$Lock 880:132org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler 881:232com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver 882:132java.lang.reflect.WeakCache$CacheKey 883:132java.text.FieldPosition 884:132java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl 885:232sun.security.x509.CertificateVersion 886:232[Lorg.apache.catalina.deploy.ContextEnvironment; 887:132[Lorg.apache.tomcat.util.net.AbstractEndpoint$Acceptor$AcceptorState; 888:132sun.nio.cs.StandardCharsets ...
C:UsersAdministrator>jhat-port80009208_0413.hprof Readingfrom9208_0413.hprof... DumpfilecreatedThuApr1321:18:58CST2017 Snapshotread,resolving... Resolving389761objects... Chasingreferences,expect77dots.......................................................................... Eliminatingduplicatereferences............................................................................ Snapshotresolved. StartedHTTPserveronport8000 Serverisready.
jinfo[option]pid jinfo[option]executablecore jinfo[option][servier-id]remote-hostname-or-IP
C:UsersAdministrator>jinfo-flags9208 AttachingtoprocessID9208,pleasewait... Debuggerattachedsuccessfully. Servercompilerdetected. JVMversionis24.75-b04 -Djava.util.logging.config.file=D:apache-tomcat-7.0.67conflogging.properties-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=D:apache-tomcat-7.0.67endorsed-Dcatalina.base=D:apache-tomcat-7.0.67-Dcatalina.home=D:apache-tomcat-7.0.67-Djava.io. tmpdir=D:apache-tomcat-7.0.67temp #在catalina.sh中可以找到设置的地方
#值类型参数 C:UsersAdministrator>jinfo-flagNewSize9208 -XX:NewSize=1310720 #开关类型参数 C:UsersAdministrator>jinfo-flagPrintGC9208 -XX:-PrintGC C:UsersAdministrator>jinfo-flagXmn9208 nosuchflag'Xmn'
C:UsersAdministrator>jinfo-flagPrintGC9208 -XX:-PrintGC C:UsersAdministrator>jinfo-flag+PrintGC9208 C:UsersAdministrator>jinfo-flagPrintGC9208 -XX:+PrintGC //2windows环境总是失败 C:UsersAdministrator>jinfo-flagPermSize=217500009208 Exceptioninthread"main"java.io.IOException:CommandfailedintargetVM atsun.tools.attach.WindowsVirtualMachine.execute(WindowsVirtualMachine.java:112) atsun.tools.attach.HotSpotVirtualMachine.executeCommand(HotSpotVirtualMachine.java:217) atsun.tools.attach.HotSpotVirtualMachine.setFlag(HotSpotVirtualMachine.java:190) atsun.tools.jinfo.JInfo.flag(JInfo.java:123) atsun.tools.jinfo.JInfo.main(JInfo.java:76)
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