> > > 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.
> You're right - we need the copy in the postmaster (to setup shared
> memory and LW locks), and we need them in the backends too.  I just want
> to avoid having to set both shared_preload_libraries and
> local_preload_libraries (to the same thing).  Adding a call to
> process_shared_preload_libraries() in SubPostmasterMain() seems to fix
> the problem for me.

Just make sure you don't load the libraries in bgwriter et al ...

Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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