shmmax

shmmax specifies system-wide maximum allowable shared memory segment size.

Acceptable Values:

Minimum
2048 (2 Kbytes)
Maximum
0x40000000 (1024 Mbytes) on 32-bit systems
Maximum 1 Tbyte on 64-bit systems
Default
0x04000000 (64 Mbytes)

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

The value used cannot exceed maximum available swap space. For minimum and maximum allowable values, as well as default value for any given system, refer to values in /etc/conf/master.d/* files.

Description

shmmax defines the system-wide maximum allowable shared memory segment size in bytes. Any shmget() system call that requests a segment larger than this limit returns an error (see HP-UX Reference entry shmget(2)).

Related Parameters

None.

Additional Information: