wiki:Increasing_the_number_of_Shared_Memory_Rings_under_Solaris
Last modified 9 years ago Last modified on 01/19/12 16:14:14
April 16,2002

SOLARIS: INCREASING THE NUMBER OF SHARED MEMORY RINGS
Under Solaris 2.6 (and probably other versions as well), the maximum number 
of shared memory segments is six. This means that on an out-of-the-box machine
you can only configure six rings. If you try to configure more than that, you
will see a cryptic message from tport_create about too many open files.  The
fix to this problem is to add the following lines to the /etc/system
file, and then reboot the system.

 set shmsys:shminfo_shmmax = 4294967295
 set shmsys:shminfo_shmmin = 1
 set shmsys:shminfo_shmmni = 100
 set shmsys:shminfo_shmseg = 20
 set semsys:seminfo_semmns = 200
 set semsys:seminfo_semmni = 70

This allows for 20 rings.