About kern.ipc.semmap on FreeBSD 9

[Efraín Déctor]

Hello. I’m currently testing FreeBSD 9.0, I want to use it as a OS for a PostgreSQL Server. However, it is recommended to modified some paramerts such as semaphores (http://www.postgresql.org/docs/9.1/static/kernel-resources.html ):

kern.ipc.semmap=256

But when I tried to change the value on FreeBSD this pops up:

sysctl: unknown oid 'kern.ipc.semmap'

What Can I do to resolve this issue?.

Thank you.