diff --git a/app/assets/javascripts/diffs/components/settings_dropdown.vue b/app/assets/javascripts/diffs/components/settings_dropdown.vue
index 879922f86a2..443fe147d6b 100644
--- a/app/assets/javascripts/diffs/components/settings_dropdown.vue
+++ b/app/assets/javascripts/diffs/components/settings_dropdown.vue
@@ -1,10 +1,19 @@
 <script>
-import { GlButtonGroup, GlButton, GlDropdown, GlFormCheckbox } from '@gitlab/ui';
+import {
+  GlButtonGroup,
+  GlButton,
+  GlDropdown,
+  GlFormCheckbox,
+  GlTooltipDirective,
+} from '@gitlab/ui';
 import { mapActions, mapGetters, mapState } from 'vuex';
 import { SETTINGS_DROPDOWN } from '../i18n';
 
 export default {
   i18n: SETTINGS_DROPDOWN,
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
   components: {
     GlButtonGroup,
     GlButton,
@@ -35,9 +44,13 @@ export default {
 
 <template>
   <gl-dropdown
+    v-gl-tooltip
     icon="settings"
-    :text="__('Diff view settings')"
+    :title="$options.i18n.preferences"
+    :text="$options.i18n.preferences"
     :text-sr-only="true"
+    :aria-label="$options.i18n.preferences"
+    :header-text="$options.i18n.preferences"
     toggle-class="js-show-diff-settings"
     right
   >
diff --git a/app/assets/javascripts/diffs/i18n.js b/app/assets/javascripts/diffs/i18n.js
index b2354af1eec..a45fd92d0a9 100644
--- a/app/assets/javascripts/diffs/i18n.js
+++ b/app/assets/javascripts/diffs/i18n.js
@@ -23,4 +23,5 @@ export const DIFF_FILE = {
 export const SETTINGS_DROPDOWN = {
   whitespace: __('Show whitespace changes'),
   fileByFile: __('Show one file at a time'),
+  preferences: __('Preferences'),
 };
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 9bc0d4a1463..28e0ab960f8 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -11459,9 +11459,6 @@ msgstr ""
 msgid "Diff limits"
 msgstr ""
 
-msgid "Diff view settings"
-msgstr ""
-
 msgid "Difference between start date and now"
 msgstr ""
 
diff --git a/spec/initializers/lograge_spec.rb b/spec/initializers/lograge_spec.rb
index 421f6373eff..651b0c8a9b8 100644
--- a/spec/initializers/lograge_spec.rb
+++ b/spec/initializers/lograge_spec.rb
@@ -120,6 +120,7 @@ RSpec.describe 'lograge', type: :request do
 
   context 'with a log subscriber' do
     include_context 'parsed logs'
+    include_context 'clear DB Load Balancing configuration'
 
     let(:subscriber) { Lograge::LogSubscribers::ActionController.new }
 
@@ -195,9 +196,25 @@ RSpec.describe 'lograge', type: :request do
     end
 
     context 'with db payload' do
+      let(:db_load_balancing_logging_keys) do
+        %w[
+          db_primary_wal_count
+          db_replica_wal_count
+          db_replica_count
+          db_replica_cached_count
+          db_primary_count
+          db_primary_cached_count
+          db_primary_duration_s
+          db_replica_duration_s
+        ]
+      end
+
+      before do
+        ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
+      end
+
       context 'when RequestStore is enabled', :request_store do
         it 'includes db counters' do
-          ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
           subscriber.process_action(event)
 
           expect(log_data).to include("db_count" => a_value >= 1, "db_write_count" => 0, "db_cached_count" => 0)
@@ -206,12 +223,47 @@ RSpec.describe 'lograge', type: :request do
 
       context 'when RequestStore is disabled' do
         it 'does not include db counters' do
-          ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
           subscriber.process_action(event)
 
           expect(log_data).not_to include("db_count", "db_write_count", "db_cached_count")
         end
       end
+
+      context 'when load balancing is enabled' do
+        before do
+          allow(Gitlab::Database::LoadBalancing).to receive(:enable?).and_return(true)
+        end
+
+        context 'with db payload' do
+          context 'when RequestStore is enabled', :request_store do
+            it 'includes db counters for load balancing' do
+              subscriber.process_action(event)
+
+              expect(log_data).to include(*db_load_balancing_logging_keys)
+            end
+          end
+
+          context 'when RequestStore is disabled' do
+            it 'does not include db counters for load balancing' do
+              subscriber.process_action(event)
+
+              expect(log_data).not_to include(*db_load_balancing_logging_keys)
+            end
+          end
+        end
+      end
+
+      context 'when load balancing is disabled' do
+        before do
+          allow(Gitlab::Database::LoadBalancing).to receive(:enable?).and_return(false)
+        end
+
+        it 'does not include db counters for load balancing' do
+          subscriber.process_action(event)
+
+          expect(log_data).not_to include(*db_load_balancing_logging_keys)
+        end
+      end
     end
   end
 end
diff --git a/spec/lib/gitlab/instrumentation_helper_spec.rb b/spec/lib/gitlab/instrumentation_helper_spec.rb
index 488324ccddc..28ae90d4947 100644
--- a/spec/lib/gitlab/instrumentation_helper_spec.rb
+++ b/spec/lib/gitlab/instrumentation_helper_spec.rb
@@ -117,6 +117,42 @@ RSpec.describe Gitlab::InstrumentationHelper do
         end
       end
     end
+
+    context 'when load balancing is enabled' do
+      include_context 'clear DB Load Balancing configuration'
+
+      before do
+        allow(Gitlab::Database::LoadBalancing).to receive(:enable?).and_return(true)
+      end
+
+      it 'includes DB counts' do
+        subject
+
+        expect(payload).to include(db_replica_count: 0,
+                                   db_replica_cached_count: 0,
+                                   db_primary_count: 0,
+                                   db_primary_cached_count: 0,
+                                   db_primary_wal_count: 0,
+                                   db_replica_wal_count: 0)
+      end
+    end
+
+    context 'when load balancing is disabled' do
+      before do
+        allow(Gitlab::Database::LoadBalancing).to receive(:enable?).and_return(false)
+      end
+
+      it 'does not include DB counts' do
+        subject
+
+        expect(payload).not_to include(db_replica_count: 0,
+                                   db_replica_cached_count: 0,
+                                   db_primary_count: 0,
+                                   db_primary_cached_count: 0,
+                                   db_primary_wal_count: 0,
+                                   db_replica_wal_count: 0)
+      end
+    end
   end
 
   describe '.queue_duration_for_job' do
diff --git a/spec/lib/gitlab/sidekiq_logging/structured_logger_spec.rb b/spec/lib/gitlab/sidekiq_logging/structured_logger_spec.rb
index 1f20cf07e0d..dfdc1420eac 100644
--- a/spec/lib/gitlab/sidekiq_logging/structured_logger_spec.rb
+++ b/spec/lib/gitlab/sidekiq_logging/structured_logger_spec.rb
@@ -228,6 +228,8 @@ RSpec.describe Gitlab::SidekiqLogging::StructuredLogger do
     end
 
     context 'when the job performs database queries' do
+      include_context 'clear DB Load Balancing configuration'
+
       before do
         allow(Time).to receive(:now).and_return(timestamp)
         allow(Process).to receive(:clock_gettime).and_call_original
@@ -248,28 +250,112 @@ RSpec.describe Gitlab::SidekiqLogging::StructuredLogger do
         )
       end
 
-      it 'logs the database time' do
-        expect(logger).to receive(:info).with(expected_start_payload).ordered
-        expect(logger).to receive(:info).with(expected_end_payload_with_db).ordered
+      shared_examples 'performs database queries' do
+        it 'logs the database time', :aggregate_errors do
+          expect(logger).to receive(:info).with(expected_start_payload).ordered
+          expect(logger).to receive(:info).with(expected_end_payload_with_db).ordered
 
-        call_subject(job, 'test_queue') do
-          ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
+          call_subject(job, 'test_queue') do
+            ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
+          end
+        end
+
+        it 'prevents database time from leaking to the next job', :aggregate_errors do
+          expect(logger).to receive(:info).with(expected_start_payload).ordered
+          expect(logger).to receive(:info).with(expected_end_payload_with_db).ordered
+          expect(logger).to receive(:info).with(expected_start_payload).ordered
+          expect(logger).to receive(:info).with(expected_end_payload).ordered
+
+          call_subject(job.dup, 'test_queue') do
+            ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
+          end
+
+          Gitlab::SafeRequestStore.clear!
+
+          call_subject(job.dup, 'test_queue') { }
         end
       end
 
-      it 'prevents database time from leaking to the next job' do
-        expect(logger).to receive(:info).with(expected_start_payload).ordered
-        expect(logger).to receive(:info).with(expected_end_payload_with_db).ordered
-        expect(logger).to receive(:info).with(expected_start_payload).ordered
-        expect(logger).to receive(:info).with(expected_end_payload).ordered
-
-        call_subject(job.dup, 'test_queue') do
-          ActiveRecord::Base.connection.execute('SELECT pg_sleep(0.1);')
+      context 'when load balancing is disabled' do
+        before do
+          allow(Gitlab::Database::LoadBalancing).to receive(:enable?).and_return(false)
         end
 
-        Gitlab::SafeRequestStore.clear!
+        let(:expected_end_payload_with_db) do
+          expected_end_payload.merge(
+            'db_duration_s' => a_value >= 0.1,
+            'db_count' => a_value >= 1,
+            'db_cached_count' => 0,
+            'db_write_count' => 0
+          )
+        end
 
-        call_subject(job.dup, 'test_queue') { }
+        include_examples 'performs database queries'
+      end
+
+      context 'when load balancing is enabled' do
+        before do
+          allow(Gitlab::Database::LoadBalancing).to receive(:enable?).and_return(true)
+        end
+
+        let(:expected_end_payload_with_db) do
+          expected_end_payload.merge(
+            'db_duration_s' => a_value >= 0.1,
+            'db_count' => a_value >= 1,
+            'db_cached_count' => 0,
+            'db_write_count' => 0,
+            'db_replica_count' => 0,
+            'db_replica_cached_count' => 0,
+            'db_replica_wal_count' => 0,
+            'db_replica_duration_s' => a_value >= 0,
+            'db_primary_count' => a_value >= 1,
+            'db_primary_cached_count' => 0,
+            'db_primary_wal_count' => 0,
+            'db_primary_duration_s' => a_value > 0
+          )
+        end
+
+        let(:end_payload) do
+          start_payload.merge(
+            'message' => 'TestWorker JID-da883554ee4fe414012f5f42: done: 0.0 sec',
+            'job_status' => 'done',
+            'duration_s' => 0.0,
+            'completed_at' => timestamp.to_f,
+            'cpu_s' => 1.111112,
+            'db_duration_s' => 0.0,
+            'db_cached_count' => 0,
+            'db_count' => 0,
+            'db_write_count' => 0,
+            'db_replica_count' => 0,
+            'db_replica_cached_count' => 0,
+            'db_replica_wal_count' => 0,
+            'db_replica_duration_s' => 0,
+            'db_primary_count' => 0,
+            'db_primary_cached_count' => 0,
+            'db_primary_wal_count' => 0,
+            'db_primary_duration_s' => 0
+          )
+        end
+
+        include_examples 'performs database queries'
+      end
+    end
+
+    context 'when the job uses load balancing capabilities' do
+      let(:expected_payload) { { 'database_chosen' => 'retry' } }
+
+      before do
+        allow(Time).to receive(:now).and_return(timestamp)
+        allow(Process).to receive(:clock_gettime).and_call_original
+      end
+
+      it 'logs the database chosen' do
+        expect(logger).to receive(:info).with(start_payload).ordered
+        expect(logger).to receive(:info).with(include(expected_payload)).ordered
+
+        call_subject(job, 'test_queue') do
+          job[:database_chosen] = 'retry'
+        end
       end
     end