Re: SHM ids (was running pgsql 7 under Jail'ed virtual machine on FreeBSD 4.2)

Alex Pilosov <alex@pilosoft.com> writes:
> I'd suggest you do this: add a global backend_shmid_offset in ipc.c,
> initialized to current default, and an option to postgres to put a value
> there.

Don't waste your time.  This issue is gone in current sources.  See
IpcMemoryCreate and IpcSemaphoreCreate in src/backend/storage/ipc/ipc.c.

            regards, tom lane