From b5f2f2a712e56fe1edf7d5665c07ee97be464c0b Mon Sep 17 00:00:00 2001
From: Simon Riggs <simon@2ndQuadrant.com>
Date: Wed, 23 Mar 2011 19:35:53 +0000
Subject: [PATCH] Minor changes to recovery pause behaviour. Change location
 LOG message so it works each time we pause, not just for final pause. Ensure
 that we pause only if we are in Hot Standby and can connect to allow us to
 run resume function. This change supercedes the code to override parameter
 recoveryPauseAtTarget to false if not attempting to enter Hot Standby, which
 is now removed.

---
 src/backend/access/transam/xlog.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 5a585f60d0..418054066d 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -5691,6 +5691,10 @@ recoveryStopsHere(XLogRecord *record, bool *includeThis)
 static void
 recoveryPausesHere(void)
 {
+	ereport(LOG,
+			(errmsg("recovery has paused"),
+			 errhint("Execute pg_xlog_replay_resume() to continue.")));
+
 	while (RecoveryIsPaused())
 	{
 		pg_usleep(1000000L);		/* 1000 ms */
@@ -6357,13 +6361,6 @@ StartupXLOG(void)
 				StandbyRecoverPreparedTransactions(false);
 			}
 		}
-		else
-		{
-			/*
-			 * Must not pause unless we are going to enter Hot Standby.
-			 */
-			recoveryPauseAtTarget = false;
-		}
 
 		/* Initialize resource managers */
 		for (rmid = 0; rmid <= RM_MAX_ID; rmid++)
@@ -6485,11 +6482,11 @@ StartupXLOG(void)
 				 */
 				if (recoveryStopsHere(record, &recoveryApply))
 				{
-					if (recoveryPauseAtTarget)
+					/*
+					 * Pause only if users can connect to send a resume message
+					 */
+					if (recoveryPauseAtTarget && standbyState == STANDBY_SNAPSHOT_READY)
 					{
-						ereport(LOG,
-								(errmsg("recovery has paused"),
-								 errhint("Execute pg_xlog_replay_resume() to continue.")));
 						SetRecoveryPause(true);
 						recoveryPausesHere();
 					}
@@ -6522,7 +6519,10 @@ StartupXLOG(void)
 				recoveryPause = xlogctl->recoveryPause;
 				SpinLockRelease(&xlogctl->info_lck);
 
-				if (recoveryPause)
+				/*
+				 * Pause only if users can connect to send a resume message
+				 */
+				if (recoveryPause && standbyState == STANDBY_SNAPSHOT_READY)
 					recoveryPausesHere();
 
 				/*
-- 
2.40.0