The following bug has been logged on the website:
Bug reference: 13971
Logged by: Alex Povolotsky
Email address: tarkhil(at)over(dot)ru
PostgreSQL version: 9.4.6
Operating system: FreeBSD 10.2
Description:
regardless of dynamic_shared_memory_type, postgres upon start still calls
shmget.
In FreeBSD's jail, with disabled sysvipc, it yields error in
src/backend/port/pg_shmem.c