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Re: shared_preload_libraries support on Win32?

From: <korryd(at)enterprisedb(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Andrew Dunstan" <andrew(at)dunslane(dot)net>,<pgsql-hackers(at)postgresql(dot)org>
Subject: Re: shared_preload_libraries support on Win32?
Date: 2007-01-29 18:21:26
Message-ID: 1170094886.8452.144.camel@sakai.localdomain (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
> Actually ... I take that back.  I was thinking of the original purpose
> of preload_libraries, which was strictly performance optimization.
> 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.

            -- Korry

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