From 8bfb231b43d7f6058041483f2b823dd52eac7bf8 Mon Sep 17 00:00:00 2001
From: Amit Kapila
Date: Fri, 10 Nov 2023 08:45:01 +0530
Subject: Prohibit max_slot_wal_keep_size to value other than -1 during
 upgrade.

We don't want existing slots in the old cluster to get invalidated during
the upgrade. During an upgrade, we set this variable to -1 via the command
line in an attempt to prevent such invalidations, but users have ways to
override it. This patch ensures the value is not overridden by the user.

Author: Kyotaro Horiguchi
Reviewed-by: Peter Smith, Alvaro Herrera
Discussion: http://postgr.es/m/20231027.115759.2206827438943188717.horikyota.ntt@gmail.com
---
 src/backend/utils/misc/guc_tables.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/backend/utils')

diff --git a/src/backend/utils/misc/guc_tables.c b/src/backend/utils/misc/guc_tables.c
index beed72abbd6..b764ef69980 100644
--- a/src/backend/utils/misc/guc_tables.c
+++ b/src/backend/utils/misc/guc_tables.c
@@ -2845,7 +2845,7 @@ struct config_int ConfigureNamesInt[] =
 		},
 		&max_slot_wal_keep_size_mb,
 		-1, -1, MAX_KILOBYTES,
-		NULL, NULL, NULL
+		check_max_slot_wal_keep_size, NULL, NULL
 	},
 
 	{
-- 
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