Re: Error reporting when hitting shared memory limits -

Pete Leonard writes:

> If you start up Postgres (7.1.2) and specify a number of buffers greater
> than what SHMMAX can provide, you get a nice, useful error message,
> detailing what's wrong, and with suggestions on how to fix it.
>
> If you start up Postgres and specify a number of buffers that falls within
> the limits of SHMMAX, but exceeds SHMALL, you get an error message like
> this:
>
> IpcMemoryCreate: shmget(key=5432001, size=29868032, 03600) failed: Cannot allocate memory

The FreeBSD shmget(2) man page does not document this error (ENOMEM).
However, the Linux shmget(2) page says

       ENOMEM      is returned if no memory  could  be  allocated
                   for segment overhead.

which probably means to raise SHMALL.

--
Peter Eisentraut   peter_e@gmx.net   http://funkturm.homeip.net/~peter