1 files changed, 25 insertions, 0 deletions
diff --git a/db/post_migrate/20220204095121_backfill_namespace_statistics_with_dependency_proxy_size.rb b/db/post_migrate/20220204095121_backfill_namespace_statistics_with_dependency_proxy_size.rb
new file mode 100644
index 00000000000..49c9efc497c
--- /dev/null
+++ b/db/post_migrate/20220204095121_backfill_namespace_statistics_with_dependency_proxy_size.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class BackfillNamespaceStatisticsWithDependencyProxySize < Gitlab::Database::Migration[1.0]
+  DELAY_INTERVAL = 2.minutes.to_i
+  BATCH_SIZE = 500
+  MIGRATION = 'PopulateNamespaceStatistics'
+
+  disable_ddl_transaction!
+
+  def up
+    groups = exec_query <<~SQL
+      SELECT dependency_proxy_manifests.group_id FROM dependency_proxy_manifests
+      UNION
+      SELECT dependency_proxy_blobs.group_id from dependency_proxy_blobs
+    SQL
+
+    groups.rows.flatten.in_groups_of(BATCH_SIZE, false).each_with_index do |group_ids, index|
+      migrate_in(index * DELAY_INTERVAL, MIGRATION, [group_ids, [:dependency_proxy_size]])
+    end
+  end
+
+  def down
+    # no-op
+  end
+end