diff --git a/admin_manual/configuration_server/config_sample_php_parameters.rst b/admin_manual/configuration_server/config_sample_php_parameters.rst
index 77a94f1b3..a6718b6ed 100644
--- a/admin_manual/configuration_server/config_sample_php_parameters.rst
+++ b/admin_manual/configuration_server/config_sample_php_parameters.rst
@@ -333,6 +333,18 @@ which would overwrite this option if it is less than the value in the config.php
 
 Defaults to ``60*60*24`` seconds (24 hours)
 
+::
+
+	'session_relaxed_expiry' => false,
+
+`true` enabled a relaxed session timeout, where the session timeout would no longer be
+handled by Nextcloud but by either the PHP garbage collection or the expiration of
+potential other session backends like redis.
+
+This may lead to sessions being available for longer than what session_lifetime uses but
+comes with performance benefits as sessions are no longer a locking operation for concurrent
+requests.
+
 ::
 
 	'session_keepalive' => true,