Solaris™ Internals: Core Kernel Components

A.2. System V IPC - Shared Memory Parameters

Table A-1 describes shared memory parameters. For more information, refer to “System V Shared Memory” .

Table A-1. System V IPC - Shared Memory

Parameter	Default	Category	Description / Notes
shmmax	1048576	Limit	System V IPC shared memory. Maximum shared memory segment size, in bytes.
shmmin	1	Limit	System V IPC shared memory. Minimum shared memory segment size, in bytes.
shmmni	100	Limit	System V IPC shared memory. Maximum number of shared memory segments, sys temwide.
shmseg	6	Limit	System V IPC shared memory. Maximum number of shared segments, per process.
segspt_minfree	5% of available memory	Limit	Number of pages of physical memory not available for allocation as ISM shared seg ments. Default value ...