`msgmnb`

msgmnb specifies the maximum total size, in bytes, of all messages that can be queued simultaneously on a message queue.

Acceptable Values:

Minimum: 0
Maximum: 65535 bytes
Default: 16384 bytes

Specify integer value. For more information, see Specifying Parameter Values.

Description

msgmnb specifies the maximum total combined size, in bytes, of all messages queued in a given message queue at any one time.

Any msgsnd() system call that attempts to exceed this limit returns the error:

EAGAIN: If IPC_NOWAIT is set.
EINTR: If IPC_NOWAIT is not set.

Related Parameters

msgmnb must be greater than or equal to msgmax
msgmnb must be less than or equal to ( msgssz * msgseg)

Additional Information