>> But in the new world of plugins there may be functional reasons for
>> wanting libraries to be loaded into backends --- and
>> shared_preload_libraries is not isomorphic to local_preload_libraries.
>> The permissions situation is different.

> And, shared_preload_libraries is processed (in the postmaster) before
> the shared-memory segment is created, so a shared_preload_library can
> call RequestAddinShmemSpace() and RequestAddinLWLocks(), but a
> local_preload_library cannot.

That doesn't seem like an issue though, since the copy in the postmaster
will have done that anyway.

                        regards, tom lane

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