From d89652473d678aa0013c7d6a2569a0fa3d8b4c4f Mon Sep 17 00:00:00 2001
From: Vladimir Luksha <luksha@limcore.io>
Date: Mon, 28 Aug 2023 18:18:05 +0300
Subject: [PATCH] fix pg_replication_lag_seconds

Signed-off-by: Vladimir Luksha <waldemarluksha@gmail.com>
---
 collector/pg_replication.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/collector/pg_replication.go b/collector/pg_replication.go
index 790f85329..6067cc9b1 100644
--- a/collector/pg_replication.go
+++ b/collector/pg_replication.go
@@ -55,6 +55,7 @@ var (
 	pgReplicationQuery = `SELECT
 	CASE
 		WHEN NOT pg_is_in_recovery() THEN 0
+                WHEN pg_last_wal_receive_lsn () = pg_last_wal_replay_lsn () THEN 0
 		ELSE GREATEST (0, EXTRACT(EPOCH FROM (now() - pg_last_xact_replay_timestamp())))
 	END AS lag,
 	CASE