Adds pkg index on (id,created_at)

db/migrate/20200901203055_add_id_created_at_index_to_packages.rb

+# frozen_string_literal: true
+
+class AddIdCreatedAtIndexToPackages < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  INDEX_NAME = 'index_packages_packages_on_id_and_created_at'
+
+  def up
+    add_concurrent_index :packages_packages, [:id, :created_at], name: INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index_by_name(:packages_packages, INDEX_NAME)
+  end
+end

db/schema_migrations/20200901203055

+eb13fb285ac9af83bbc66397a5352a824575ad4af93178b98fbfc1be2e11ce8b
\ No newline at end of file

db/structure.sql

@@ -20463,6 +20463,8 @@ CREATE INDEX index_packages_package_files_on_package_id_and_file_name ON public.
 
 CREATE INDEX index_packages_packages_on_creator_id ON public.packages_packages USING btree (creator_id);
 
+CREATE INDEX index_packages_packages_on_id_and_created_at ON public.packages_packages USING btree (id, created_at);
+
 CREATE INDEX index_packages_packages_on_name_trigram ON public.packages_packages USING gin (name public.gin_trgm_ops);
 
 CREATE INDEX index_packages_packages_on_project_id_and_created_at ON public.packages_packages USING btree (project_id, created_at);