Reduce DB load when resetting CI minute notifications

changelogs/unreleased/mc-bug-reduce-ci-minute-namespace-notification-db-load.yml

+---
+title: Reduce DB load when resetting CI minute notifications.
+merge_request: 55765
+author:
+type: performance

ee/app/models/ee/namespace.rb

@@ -69,6 +69,11 @@ module Namespace
         where("EXISTS (?)", matcher)
       end
 
+      scope :without_last_ci_minutes_notification, -> do
+        where.not(last_ci_minutes_notification_at: nil)
+          .or(where.not(last_ci_minutes_usage_notification_level: nil))
+      end
+
       delegate :shared_runners_seconds, :shared_runners_seconds_last_reset, to: :namespace_statistics, allow_nil: true
 
       delegate :additional_purchased_storage_size, :additional_purchased_storage_size=,

ee/app/services/ci/minutes/batch_reset_service.rb

@@ -111,9 +111,10 @@ def reset_shared_runners_seconds!(namespaces)
       end
 
       def reset_ci_minutes_notifications!(namespaces)
-        namespaces.update_all(
+        namespaces.without_last_ci_minutes_notification.update_all(
           last_ci_minutes_notification_at: nil,
-          last_ci_minutes_usage_notification_level: nil)
+          last_ci_minutes_usage_notification_level: nil
+        )
       end
     end
   end