HP-UX Reference (11i v2 03/08) - 5 Miscellaneous Topics, 7 Device (Special) Files, 9 General Information, Index (vol 9)

shmem(5) shmem(5)

(Tunable Kernel Parameters)

NAME

shmem - enable or disable System V shared memory

DESCRIPTION

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shmem tunable is obsolete.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.

AUTHOR

shmem was developed by HP.