1 files changed, 12 insertions, 1 deletions
diff --git a/lib/gitlab/middleware/rails_queue_duration.rb b/lib/gitlab/middleware/rails_queue_duration.rb
index 63c3372da51..bc70b2459ef 100644
--- a/lib/gitlab/middleware/rails_queue_duration.rb
+++ b/lib/gitlab/middleware/rails_queue_duration.rb
@@ -14,11 +14,22 @@ module Gitlab
         proxy_start = env['HTTP_GITLAB_WORKHORSE_PROXY_START'].presence
         if trans && proxy_start
           # Time in milliseconds since gitlab-workhorse started the request
-          trans.set(:rails_queue_duration, Time.now.to_f * 1_000 - proxy_start.to_f / 1_000_000)
+          duration = Time.now.to_f * 1_000 - proxy_start.to_f / 1_000_000
+          trans.set(:rails_queue_duration, duration)
+          metric_rails_queue_duration_seconds.observe(trans.labels, duration / 1_000)
         end
 
         @app.call(env)
       end
+
+      private
+
+      def metric_rails_queue_duration_seconds
+        @metric_rails_queue_duration_seconds ||= Gitlab::Metrics.histogram(
+          :gitlab_rails_queue_duration_seconds,
+          Gitlab::Metrics::Transaction::BASE_LABELS
+        )
+      end
     end
   end
 end