From 384a2a4d8f579d5151cb5bb2d03f96644279275d Mon Sep 17 00:00:00 2001
From: Alexander Kukushkin <cyberdemn@gmail.com>
Date: Thu, 27 Jul 2023 13:38:24 +0200
Subject: [PATCH] Avoid unnecessary updates of /status key (#2782)

When we don't have permanent logical slots Patroni was updating the `/status` on every heart-beat loop even when LSN on the primary isn't moving forward.

The issue was introduced in the #2485
---
 patroni/dcs/__init__.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/patroni/dcs/__init__.py b/patroni/dcs/__init__.py
index f07ce6cd..29a4d766 100644
--- a/patroni/dcs/__init__.py
+++ b/patroni/dcs/__init__.py
@@ -1033,7 +1033,9 @@ class AbstractDCS(abc.ABC):
             raise
 
         self._last_seen = int(time.time())
-        self._last_status = {self._OPTIME: cluster.last_lsn, 'slots': cluster.slots}
+        self._last_status = {self._OPTIME: cluster.last_lsn}
+        if cluster.slots:
+            self._last_status['slots'] = cluster.slots
         self._last_failsafe = cluster.failsafe
 
         with self._cluster_thread_lock: