From a37b006d89b85c4b8ca92ee53580a1c3ea385be7 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Thu, 8 Feb 2007 15:46:04 +0000
Subject: [PATCH] This patch fixes shared_preload_libraries on Windows hosts.
It forces ach backend to re-load all shared_preload_libraries.
Korry Douglas
---
doc/src/sgml/config.sgml | 13 ++++++++++++-
src/backend/postmaster/postmaster.c | 11 ++++++++++-
2 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 2d4dfa8bd3a..e5c73b4e361 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.109 2007/02/08 03:56:42 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.110 2007/02/08 15:46:03 momjian Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
@@ -990,6 +990,17 @@ SET ENABLE_SEQSCAN TO OFF;
libraries that will be used in most sessions.
</para>
+ <note>
+ <para>
+ On Windows hosts, preloading a library at server start will not reduce
+ the time required to start each new server process; each server process
+ will re-load all preload libraries. However, <varname>shared_preload_libraries
+ </varname> is still useful on Windows hosts because some shared libraries may
+ need to perform certain operations that only take place at postmaster start
+ (for example, a shared library may need to reserve lightweight locks
+ or shared memory and you can't do that after the postmaster has started).
+ </para>
+ </note>
<para>
If a specified library is not found,
the server will fail to start.
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index bac1cff46e7..06d8f99a82b 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.517 2007/02/07 16:44:48 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.518 2007/02/08 15:46:04 momjian Exp $
*
* NOTES
*
@@ -3360,6 +3360,15 @@ SubPostmasterMain(int argc, char *argv[])
secure_initialize();
#endif
+ /*
+ * process any libraries that should be preloaded at postmaster start
+ *
+ * NOTE: we have to re-load the shared_preload_libraries here because
+ * this backend is not fork()ed so we can't inherit any shared
+ * libraries / DLL's from our parent (the postmaster).
+ */
+ process_shared_preload_libraries();
+
/*
* Perform additional initialization and client authentication.
*
--
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