From 92ffca5a7a79693620dc60834a321ae4f75863c8 Mon Sep 17 00:00:00 2001
From: ralf <rb@egroupware.org>
Date: Tue, 10 Dec 2024 10:30:04 +0100
Subject: [PATCH] rate limit notifications push-message-cleanup to once per
 hour as they lock the notifications table and block each other

---
 notifications/inc/class.notifications_push.inc.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/notifications/inc/class.notifications_push.inc.php b/notifications/inc/class.notifications_push.inc.php
index 0004b1ee8e..98c936bd03 100644
--- a/notifications/inc/class.notifications_push.inc.php
+++ b/notifications/inc/class.notifications_push.inc.php
@@ -121,6 +121,14 @@ class notifications_push implements Json\PushBackend
 	 */
 	protected static function cleanup_push_msgs()
 	{
+		// rate limit the deletes: max. once per hour for the instance
+		$stamp = date('YmdH');
+		if (Api\Cache::getInstance(__CLASS__, __FUNCTION__) === $stamp)
+		{
+			return;
+		}
+		Api\Cache::setInstance(__CLASS__, __FUNCTION__, $stamp);
+
 		if (($ts = self::$db->from_unixtime(Api\Session::heartbeat_limit())))
 		{
 			try {