diff --git a/modules/ROOT/pages/configuration/configuration-settings.adoc b/modules/ROOT/pages/configuration/configuration-settings.adoc
index 7b56966fa9..7a54fb5fb4 100644
--- a/modules/ROOT/pages/configuration/configuration-settings.adoc
+++ b/modules/ROOT/pages/configuration/configuration-settings.adoc
@@ -5670,6 +5670,11 @@ a|label:changed[Changed in 2026.04] A string that matches the pattern `^(true\|k
 m|+++2 days 2G+++
 |===
 
+[NOTE]
+====
+When using a period-based restriction with size of logs to keep, add only the period type, for example, `2 days 2G`.
+Additionally, in this case, only `hours` and `days` are allowed, for example, `2 years 100G` is not allowed.
+====
 
 [role=label--dynamic]
 [[config_db.tx_log.rotation.size]]