From 95ef7cd40da69feff0ab1f2e4964949e6fb15383 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Fri, 13 Aug 2010 15:42:21 +0000
Subject: [PATCH] Make RecordTransactionCommit() respect wal_level.

Since the only purpose of WAL-loggin SharedInvalidationMessages is to support
Hot Standby operation, they needn't be included when wal_level < hot_standby.

Back-patch to 9.0.

Review by Heikki Linnakanagas and Fujii Masao.
---
 src/backend/access/transam/xact.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index 37764891d7..0491d2c8d9 100644
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.296 2010/08/12 23:24:53 rhaas Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.297 2010/08/13 15:42:21 rhaas Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -915,15 +915,16 @@ RecordTransactionCommit(void)
 	bool		haveNonTemp;
 	int			nchildren;
 	TransactionId *children;
-	int			nmsgs;
+	int			nmsgs = 0;
 	SharedInvalidationMessage *invalMessages = NULL;
-	bool		RelcacheInitFileInval;
+	bool		RelcacheInitFileInval = false;
 
 	/* Get data needed for commit record */
 	nrels = smgrGetPendingDeletes(true, &rels, &haveNonTemp);
 	nchildren = xactGetCommittedChildren(&children);
-	nmsgs = xactGetCommittedInvalidationMessages(&invalMessages,
-												 &RelcacheInitFileInval);
+	if (XLogStandbyInfoActive())
+		nmsgs = xactGetCommittedInvalidationMessages(&invalMessages,
+													 &RelcacheInitFileInval);
 
 	/*
 	 * If we haven't been assigned an XID yet, we neither can, nor do we want