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.