after restart (host boot, jail start/stop) postgesql fails to start

[Knappe]

installed postgresql96-server in a new jail.

The start of postgresql inside the jail fails with the error message

sql postgres[3879]: [2-1] FATAL: could not create shared memory segment: Function not implemented
sql postgres[3879]: [2-2] DETAIL: Failed system call was shmget(key=5432001, size=48, 03600).

For error correction, the parameter "jail_sysvipc_allow="YES" must be specified on the host in the "/etc/sysctrl.conf beforehand (see here)
Created commands

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echo 'jail_sysvipc_allow="YES"' >> /etc/sysctl.conf
echo 'jail_sysvipc_allow="YES"' >> /etc/rc.conf

(both type=postinit) in the System / Advanced / Command Script Tab.
This is executed and placed correctly in the "/etc/sysctl.conf" and "/etc/rc.conf".

But that doesn´t work because postgresql inside the jail won´t start.

If i use

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jail -m -n sql allow.sysvipc=1

on the host, postgresql could executed without any problems.
But the command is only valid until the next start of the jail, so I couldn`t use it during boot on the host.

Any help is appreciated.

[Knappe]

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