postgres[993]: [1-1] FATAL:  could not create semaphores: No space left on device
postgres[993]: [1-2] DETAIL:  Failed system call was semget(5432003, 17, 03600).
postgres[993]: [1-3] HINT:  This error does *not* mean that you have run out of disk space. 
postgres[993]: [1-4]     It occurs when either the system limit for the maximum number of semaphore sets (SEMMNI), or the system wide maximum number of 
postgres[993]: [1-5]  semaphores (SEMMNS), would be exceeded.  You need to raise the respective kernel parameter.  Alternatively, reduce PostgreSQL's
postgres[993]: [1-6]  consumption of semaphores by reducing its max_connections parameter (currently 40).
postgres[993]: [1-7]     The PostgreSQL documentation contains more information about configuring your system for PostgreSQL.

kern.ipc.semmni=255
kern.ipc.semmns=512
kern.ipc.semmnu=256