diff --git a/admin/tool/log/store/legacy/db/tasks.php b/admin/tool/log/store/legacy/db/tasks.php
index 24522d95703..7aeed6772b0 100644
--- a/admin/tool/log/store/legacy/db/tasks.php
+++ b/admin/tool/log/store/legacy/db/tasks.php
@@ -28,7 +28,7 @@ $tasks = array(
     array(
         'classname' => '\logstore_legacy\task\cleanup_task',
         'blocking' => 0,
-        'minute' => '*',
+        'minute' => 'R',
         'hour' => '5',
         'day' => '*',
         'dayofweek' => '*',
diff --git a/admin/tool/log/store/standard/db/tasks.php b/admin/tool/log/store/standard/db/tasks.php
index f51c812367d..fa6cc9d0a2c 100644
--- a/admin/tool/log/store/standard/db/tasks.php
+++ b/admin/tool/log/store/standard/db/tasks.php
@@ -28,7 +28,7 @@ $tasks = array(
     array(
         'classname' => '\logstore_standard\task\cleanup_task',
         'blocking' => 0,
-        'minute' => '*',
+        'minute' => 'R',
         'hour' => '4',
         'day' => '*',
         'dayofweek' => '*',