shmem(5)                                                           shmem(5)
                          Tunable Kernel Parameters



 NAME    [Toc]    [Back]
      shmem - enable or disable System V shared memory

 DESCRIPTION    [Toc]    [Back]
      The shmem tunable is obsolete.  The System V IPC shared memory
      subsystem is always enabled.

      Shared memory is an efficient InterProcess Communications (IPC)
      mechanism.  One process creates a shared memory segment and attaches
      it to its address space.  Any processes looking to communicate with
      this process through the shared memory segment, then attach the shared
      memory segment to their corresponding address spaces as well.  Once
      attached, a process can read from or write to the segment depending on
      the permissions specified while attaching it.

 WARNINGS    [Toc]    [Back]
      Installation of optional kernel software, from HP or other vendors,
      may cause changes to tunable parameter values.  After installation,
      some tunable parameters may no longer be at the default or recommended
      values.  For information about the effects of installation on tunable
      values, consult the documentation for the kernel software being
      installed. For information about optional kernel software that was
      factory installed on your system, see HP-UX Release Notes at
      http://docs.hp.com.

 AUTHOR    [Toc]    [Back]
      shmem was developed by HP.

 SEE ALSO    [Toc]    [Back]
      shmmax(5), shmmni(5), shmseg(5).


 Hewlett-Packard Company            - 1 -      HP-UX 11i Version 2: Sep 2004