SHMMAX Maximum size of a single shared memory segment
SHMMIN Minimum size of a single shared memory segment
SHMMNI Maximum number of shared memory segments in entire system
SHMSEG Maximum number of shared memory segments one process can attach
SEMMNS Maximum number of semaphores in entire system
SEMMSL Maximum number of semaphores per set
SEMMNI Maximum number of semaphore sets in entire system
in Linux
in Windows
in Sun
