1 files changed, 22 insertions, 0 deletions
diff --git a/lib/gitlab/metrics/subscribers/active_record.rb b/lib/gitlab/metrics/subscribers/active_record.rb
new file mode 100644
index 00000000000..8008b3bc895
--- /dev/null
+++ b/lib/gitlab/metrics/subscribers/active_record.rb
@@ -0,0 +1,22 @@
+module Gitlab
+  module Metrics
+    module Subscribers
+      # Class for tracking the total query duration of a transaction.
+      class ActiveRecord < ActiveSupport::Subscriber
+        attach_to :active_record
+
+        def sql(event)
+          return unless current_transaction
+
+          current_transaction.increment(:sql_duration, event.duration)
+        end
+
+        private
+
+        def current_transaction
+          Transaction.current
+        end
+      end
+    end
+  end
+end