Here's the story about pgsql and jail:
1. FreeBSD shared memory is _really_ shared across all jail VMs. I think
its not going to change, as this seems like a great way for processes to
exchange data...But I could be wrong. :)
2. Postgres uses some funky math to determine which shmid to use for
d
read the jail man page:
jail.sysvipc_allowed
This MIB entry determines whether or not processes within a jail
have access to System V IPC primitives. In the current jail imple-
mentation, System V primitives share a single namespace across the
host a
