Obsolete inter-process communications (IPC) parameters

Obsolete semaphore parameters

SEMMAP

Formerly, specified the size of the semaphore map.

SEMMNS

Formerly, specified the number of semaphores in the system.

SEMMNU

Formerly, specified the number of undo structures in the system. Now, the number of undo structures is limited by SEMUME per process.

Obsolete shared memory parameters

SHMALL

Formerly, the maximum number of in-use shared memory segments. This parameter has no function in Release 4 or 5.

Obsolete message queue parameters

MSGMAP

Formerly, specified the size of the control map used to manage message segments.