这篇仅仅记录参数应用,大多数还是须要本人推敲

同时还须要保持

:)

jps

C:\Users\98du>jps -helpusage: jps [-help]       jps [-q] [-mlvV] [<hostid>]Definitions:    <hostid>:      <hostname>[:<port>]C:\Users\98du>

参数阐明

-q      : 过程id-m      : 启动该过程所 输出执行的java 命令(不蕴含jvm参数)-l      : 启动的jar文件名或者包类名-v      : java过程启动参数(进jvm参数 不蕴含-m的输入)-V      : 过程工具简写(默认该参数)hostid这个参数须要为hostname, 而不是ip

jmap

C:\Users\98du>jmap -hUsage:    jmap [option] <pid>        (to connect to running process)    jmap [option] <executable <core>        (to connect to a core file)    jmap [option] [server_id@]<remote server IP or hostname>        (to connect to remote debug server)where <option> is one of:    <none>               to print same info as Solaris pmap    -heap                to print java heap summary    -histo[:live]        to print histogram of java object heap; if the "live"                         suboption is specified, only count live objects    -clstats             to print class loader statistics    -finalizerinfo       to print information on objects awaiting finalization    -dump:<dump-options> to dump java heap in hprof binary format                         dump-options:                           live         dump only live objects; if not specified,                                        all objects in the heap are dumped.                           format=b     binary format                           file=<file>  dump heap to <file>                         Example: jmap -dump:live,format=b,file=heap.bin <pid>    -F                   force. Use with -dump:<dump-options> <pid> or -histo                         to force a heap dump or histogram when <pid> does not                         respond. The "live" suboption is not supported                         in this mode.    -h | -help           to print this help message    -J<flag>             to pass <flag> directly to the runtime systemC:\Users\98du>

参数阐明

-heap       : 打印各过程的jvm参数配置, 同时会打印举荐配置-histo      : 打印各个类的对象数及占用大小-histo:live : 只计算流动的对象-clstats    : 打印class加载的类..?-finalizerinfo  : 打印正在gc的类.?-dump示例C:\Users\98du>jmap -dump:format=b,file="D:\test\test-jmap\t.hprof" 18704Dumping heap to D:\test\test-jmap\t.hprof ...Heap dump file createdC:\Users\98du>

jstack

C:\Users\98du>jstack -hUsage:    jstack [-l] <pid>        (to connect to running process)    jstack -F [-m] [-l] <pid>        (to connect to a hung process)    jstack [-m] [-l] <executable> <core>        (to connect to a core file)    jstack [-m] [-l] [server_id@]<remote server IP or hostname>        (to connect to a remote debug server)Options:    -F  to force a thread dump. Use when jstack <pid> does not respond (process is hung)    -m  to print both java and native frames (mixed mode)    -l  long listing. Prints additional information about locks    -h or -help to print this help messageC:\Users\98du>

jconsole(图形化操作)

命令行或者win+r输出jconsole即可

多看看吧, 兄die

首发链接