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jmap(1)                                                                jmap(1)

       jmap - Memory Map

       jmap [ option ] pid
       jmap [ option ] executable core
       jmap [ option ] [server-id@]remote-hostname-or-IP

             Options  are  mutually  exclusive. Option, if used, should follow
             immediately after the command name.

             process id for which the memory map is to be printed. The process
             must  be  a Java process. To get a list of Java processes running
             on a machine, jps(1) may be used.

             Java executable from which the core dump was produced.

             core file for which the memory map is to be printed.

             remote debug server's (see jsadebugd(1)) hostname or IP  address.

             optional  unique id, if multiple debug servers are running on the
             same remote host.

       jmap prints shared object memory maps or heap memory details of a given
       process  or core file or a remote debug server. If the given process is
       running on a 64-bit VM, you may need  to  specify  the  -J-d64  option,

          jmap -J-d64 -heap pid

       NOTE  -  This utility is unsupported and may or may not be available in
       future versions of the JDK.

       The only forms of jmap available on the Windows platform are

          jmap -dump:<dump-options> pid

          jmap -histo[:live] pid

          <no option>
             When no option is used jmap prints shared  object  mappings.  For
             each  shared  object  loaded in the target VM, start address, the
             size of the mapping, and the full path of the shared object  file
             are printed. This is similar to the Solaris pmap utility.

             Dumps  the Java heap in hprof binary format to filename. The live
             suboption is optional. If specified, only the live objects in the
             heap  are  dumped.  To  browse the heap dump, you can use jhat(1)
             (Java Heap Analysis Tool) to read the generated file.

             Prints information on objects awaiting finalization.

             Prints a heap summary. GC algorithm used, heap configuration  and
             generation wise heap usage are printed.

             Prints  a  histogram  of the heap. For each Java class, number of
             objects, memory size in bytes, and fully  qualified  class  names
             are printed. VM internal class names are printed with '*' prefix.
             If the  live  suboption  is  specified,  only  live  objects  are

             Prints  class  loader  wise statistics of permanent generation of
             Java heap. For each class loader, its  name,  liveness,  address,
             parent  class  loader,  and the number and size of classes it has
             loaded are printed. In addition, the number and size of  interned
             Strings are printed.

          -F Force.  Use with jmap -dump or jmap -histo option if the pid does
             not respond. The live suboption is not supported in this mode.

          -h Prints a help message.

             Prints a help message.

             Passes <flag> to the Java virtual machine on which jmap is run.

          o pmap(1)

          o jhat(1)

          o jps(1)

          o jsadebugd(1)

                                  06 Apr 2010                          jmap(1)

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Quelle: http://www.trinler.net/de/service/doc/linux/man.html?command=jmap
Gedruckt am: 16.12.2017 04:26 GMT+0100 (2017-12-16T04:26:24+01:00)