Re: Running two postmasters on one host: could not create semaphores

Edwin New <edwin_new@toll.com.au> writes:
> I get the error:

>     FATAL:  could not create semaphores: No space left on device
>     DETAIL:  Failed system call was semget(6100001, 17, 03600).
>     HINT:  This error does *not* mean that you have run out of disk
> space.
>         It occurs when either the system limit for the maximum
> number of semaphore sets (SEMMNI),
>     Or the system wide maximum number of semaphores (SEMMNS), would be
> exceeded.  You need to raise
>     The respective kernel parameter.  Alternatively, reduce PostgreSQL's
> consumption of semaphores
>     By reducing its max_connections parameter (currently 40).
>     The PostgreSQL documentation contains more information about
> configuring your system for     PostgreSQL.

> Is it a shortage of semaphores, or a competition problem between the
> postmasters?  Is there something else I need to do?

Isn't the HINT clear enough?  Raise SEMMNI and/or SEMMNS.

            regards, tom lane