Bruce Momjian <bruce(at)momjian(dot)us> writes:
> When we panic, we PANIC, meaning we don't jump around looking for
> cleanup stuff, which might make things worse.
I think also there was some thought that we should intentionally leave
the shmem segment around for debugging purposes.
In any case, I believe the behavior complained of here is specific to
--single mode, which is surely not a production scenario, thus even
less reason to be concerned about it. (If a postmaster child panics,
the postmaster will still shut down normally and thus release the
shmem segment.)
regards, tom lane