JMAP(1)                          JDK Commands                          JMAP(1)

NAME
       jmap - print details of a specified process

SYNOPSIS
       Note: This command is experimental and unsupported.

       jmap [options] pid

       options
              This represents the jmap command-line options.  See Options for
              the jmap Command.

       pid    The process ID for which the information specified by the
              options is to be printed.  The process must be a Java process.
              To get a list of Java processes running on a machine, use either
              the ps command or, if the JVM processes are not running in a
              separate docker instance, the jps command.

DESCRIPTION
       The jmap command prints details of a specified running process.

       Note:

       This command is unsupported and might not be available in future
       releases of the JDK.  On Windows Systems where the dbgeng.dll file
       isn't present, the Debugging Tools for Windows must be installed to
       make these tools work.  The PATH environment variable should contain
       the location of the jvm.dll file that's used by the target process or
       the location from which the core dump file was produced.

OPTIONS FOR THE JMAP COMMAND
       -clstats pid
              Connects to a running process and prints class loader statistics
              of Java heap.

       -finalizerinfo pid
              Connects to a running process and prints information on objects
              awaiting finalization.

       -histo[:live] pid
              Connects to a running process and prints a histogram of the Java
              object heap.  If the live suboption is specified, it then counts
              only live objects.

       -dump:dump_options pid
              Connects to a running process and dumps the Java heap.  The
              dump_options include:

              o live --- When specified, dumps only the live objects; if not
                specified, then dumps all objects in the heap.

              o format=b --- Dumps the Java heap in hprof binary format

              o file=filename --- Dumps the heap to filename

              Example: jmap -dump:live,format=b,file=heap.bin pid

JDK 17                               2021                              JMAP(1)