1 files changed, 53 insertions, 0 deletions
diff --git a/lib/gitlab/database/migrations/observers/batch_details.rb b/lib/gitlab/database/migrations/observers/batch_details.rb
new file mode 100644
index 00000000000..0f8cdcf3cd6
--- /dev/null
+++ b/lib/gitlab/database/migrations/observers/batch_details.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Database
+    module Migrations
+      module Observers
+        class BatchDetails < MigrationObserver
+          FILE_NAME = 'batch-details.json'
+
+          def before
+            @started_at = get_time
+          end
+
+          def after
+            @finished_at = get_time
+          end
+
+          def record
+            File.open(path, 'wb') { |file| file.write(file_contents.to_json) }
+          end
+
+          private
+
+          attr_reader :started_at, :finished_at
+
+          def file_contents
+            { time_spent: time_spent }.merge(job_meta)
+          end
+
+          def get_time
+            Process.clock_gettime(Process::CLOCK_MONOTONIC)
+          end
+
+          def time_spent
+            @time_spent ||= (finished_at - started_at).round(2)
+          end
+
+          def path
+            File.join(output_dir, FILE_NAME)
+          end
+
+          def job_meta
+            meta = observation.meta
+
+            return {} unless meta
+
+            meta[:job_meta].to_h
+          end
+        end
+      end
+    end
+  end
+end