Removes update_statistics_namespace feature flag

After measuring the impact of the namespace storage on
https://gitlab.com/gitlab-org/gitlab-ce/issues/64092. It was decided
that it's performant enough. So we can freely remove the feature flag

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/64092

app/models/concerns/update_project_statistics.rb

@@ -73,15 +73,10 @@ module UpdateProjectStatistics
 
     def schedule_namespace_aggregation_worker
       run_after_commit do
-        next unless schedule_aggregation_worker?
+        next if project.nil?
 
         Namespaces::ScheduleAggregationWorker.perform_async(project.namespace_id)
       end
     end
-
-    def schedule_aggregation_worker?
-      !project.nil? &&
-        Feature.enabled?(:update_statistics_namespace, project.root_ancestor)
-    end
   end
 end

app/models/project_statistics.rb

@@ -93,13 +93,7 @@ class ProjectStatistics < ApplicationRecord
 
   def schedule_namespace_aggregation_worker
     run_after_commit do
-      next unless schedule_aggregation_worker?
-
       Namespaces::ScheduleAggregationWorker.perform_async(project.namespace_id)
     end
   end
-
-  def schedule_aggregation_worker?
-    Feature.enabled?(:update_statistics_namespace, project&.root_ancestor)
-  end
 end

app/workers/namespaces/root_statistics_worker.rb

@@ -9,7 +9,7 @@ module Namespaces
     def perform(namespace_id)
       namespace = Namespace.find(namespace_id)
 
-      return unless update_statistics_enabled_for?(namespace) && namespace.aggregation_scheduled?
+      return unless namespace.aggregation_scheduled?
 
       Namespaces::StatisticsRefresherService.new.execute(namespace)
 
@@ -23,9 +23,5 @@ module Namespaces
     def log_error(namespace_path, error_message)
       Gitlab::SidekiqLogger.error("Namespace statistics can't be updated for #{namespace_path}: #{error_message}")
     end
-
-    def update_statistics_enabled_for?(namespace)
-      Feature.enabled?(:update_statistics_namespace, namespace)
-    end
   end
 end

app/workers/namespaces/schedule_aggregation_worker.rb

@@ -12,7 +12,7 @@ module Namespaces
       namespace = Namespace.find(namespace_id)
       root_ancestor = namespace.root_ancestor
 
-      return unless update_statistics_enabled_for?(root_ancestor) && !root_ancestor.aggregation_scheduled?
+      return if root_ancestor.aggregation_scheduled?
 
       Namespace::AggregationSchedule.safe_find_or_create_by!(namespace_id: root_ancestor.id)
     rescue ActiveRecord::RecordNotFound
@@ -37,9 +37,5 @@ module Namespaces
     def log_error(root_ancestor_id)
       Gitlab::SidekiqLogger.error("Namespace can't be scheduled for aggregation: #{root_ancestor_id} does not exist")
     end
-
-    def update_statistics_enabled_for?(root_ancestor)
-      Feature.enabled?(:update_statistics_namespace, root_ancestor)
-    end
   end
 end

changelogs/unreleased/64092-removes-update-statistics-namespace-feature-flag.yml

+---
+title: Enables storage statistics for root namespaces on database
+merge_request: 31392
+author:
+type: other

spec/models/project_statistics_spec.rb

@@ -140,18 +140,7 @@ describe ProjectStatistics do
       let(:namespace) { create(:group) }
       let(:project) { create(:project, namespace: namespace) }
 
-      context 'when the feature flag is off' do
-        it 'does not schedule the aggregation worker' do
-          stub_feature_flags(update_statistics_namespace: false, namespace: namespace)
-
-          expect(Namespaces::ScheduleAggregationWorker)
-            .not_to receive(:perform_async)
-
-          statistics.refresh!(only: [:lfs_objects_size])
-        end
-      end
-
-      context 'when the feature flag is on' do
+      context 'when arguments are passed' do
         it 'schedules the aggregation worker' do
           expect(Namespaces::ScheduleAggregationWorker)
             .to receive(:perform_async)

spec/support/shared_examples/models/update_project_statistics_shared_examples.rb

@@ -32,19 +32,6 @@ shared_examples_for 'UpdateProjectStatistics' do
 
       subject.save!
     end
-
-    context 'when feature flag is disabled for the namespace' do
-      it 'does not schedules a namespace statistics worker' do
-        namespace = subject.project.root_ancestor
-
-        stub_feature_flags(update_statistics_namespace: false, namespace: namespace)
-
-        expect(Namespaces::ScheduleAggregationWorker)
-          .not_to receive(:perform_async)
-
-        subject.save!
-      end
-    end
   end
 
   context 'when updating' do
@@ -87,20 +74,6 @@ shared_examples_for 'UpdateProjectStatistics' do
         subject.save!
       end.not_to exceed_query_limit(control_count)
     end
-
-    context 'when the feature flag is disabled for the namespace' do
-      it 'does not schedule a namespace statistics worker' do
-        namespace = subject.project.root_ancestor
-
-        stub_feature_flags(update_statistics_namespace: false, namespace: namespace)
-
-        expect(Namespaces::ScheduleAggregationWorker)
-          .not_to receive(:perform_async)
-
-        subject.write_attribute(statistic_attribute, read_attribute + delta)
-        subject.save!
-      end
-    end
   end
 
   context 'when destroying' do
@@ -144,18 +117,5 @@ shared_examples_for 'UpdateProjectStatistics' do
         project.destroy!
       end
     end
-
-    context 'when feature flag is disabled for the namespace' do
-      it 'does not schedule a namespace statistics worker' do
-        namespace = subject.project.root_ancestor
-
-        stub_feature_flags(update_statistics_namespace: false, namespace: namespace)
-
-        expect(Namespaces::ScheduleAggregationWorker)
-          .not_to receive(:perform_async)
-
-        subject.destroy!
-      end
-    end
   end
 end

spec/workers/namespaces/root_statistics_worker_spec.rb

@@ -74,15 +74,4 @@ describe Namespaces::RootStatisticsWorker, '#perform' do
       worker.perform(group.id)
     end
   end
-
-  context 'when update_statistics_namespace is off' do
-    it 'does not create a new one' do
-      stub_feature_flags(update_statistics_namespace: false, namespace: group)
-
-      expect_any_instance_of(Namespaces::StatisticsRefresherService)
-        .not_to receive(:execute)
-
-      worker.perform(group.id)
-    end
-  end
 end

spec/workers/namespaces/schedule_aggregation_worker_spec.rb

@@ -31,16 +31,6 @@ describe Namespaces::ScheduleAggregationWorker, '#perform', :clean_gitlab_redis_
         expect(group.aggregation_schedule).to be_present
       end
     end
-
-    context 'when update_statistics_namespace is off' do
-      it 'does not create a new one' do
-        stub_feature_flags(update_statistics_namespace: false, namespace: group)
-
-        expect do
-          worker.perform(group.id)
-        end.not_to change(Namespace::AggregationSchedule, :count)
-      end
-    end
   end
 
   context 'when group is not the root ancestor' do