Re: BUG #13971: SysV shm is used regardless of config - Mailing list pgsql-bugs

On Thu, Feb 18, 2016 at 4:43 AM,  <tarkhil@over.ru> wrote:
> The following bug has been logged on the website:
>
> Bug reference:      13971
> Logged by:          Alex Povolotsky
> Email address:      tarkhil@over.ru
> PostgreSQL version: 9.4.6
> Operating system:   FreeBSD 10.2
> Description:
>
> regardless of dynamic_shared_memory_type, postgres upon start still calls
> shmget.

That setting controls what kind of memory is used by custom dynamic
Background Worker Processes.  It is not the only shared memory used by
PostgreSQL--in fact most people don't use that kind at all because
most people don't use custom dynamic background worker processes.


> In FreeBSD's jail, with disabled sysvipc, it yields error in
> src/backend/port/pg_shmem.c

You can't do that.  sysvipc is not optional.

Cheers,

Jeff