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Tunable parameters

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.


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