Index projects on repository storage

changelogs/unreleased/ee-add-project-repository-storages-index.yml

+---
+title: Index projects on repository storage
+merge_request: 14414
+author:
+type: other

db/migrate/20170921115009_add_project_repository_storage_index.rb

+class AddProjectRepositoryStorageIndex < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index(*index_spec) unless index_exists?(*index_spec)
+  end
+
+  def down
+    remove_concurrent_index(*index_spec) if index_exists?(*index_spec)
+  end
+
+  def index_spec
+    [:projects, :repository_storage]
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
-ActiveRecord::Schema.define(version: 20170918223303) do
+ActiveRecord::Schema.define(version: 20170921115009) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -1230,6 +1230,7 @@ ActiveRecord::Schema.define(version: 20170918223303) do
   add_index "projects", ["path"], name: "index_projects_on_path", using: :btree
   add_index "projects", ["path"], name: "index_projects_on_path_trigram", using: :gin, opclasses: {"path"=>"gin_trgm_ops"}
   add_index "projects", ["pending_delete"], name: "index_projects_on_pending_delete", using: :btree
+  add_index "projects", ["repository_storage"], name: "index_projects_on_repository_storage", using: :btree
   add_index "projects", ["runners_token"], name: "index_projects_on_runners_token", using: :btree
   add_index "projects", ["star_count"], name: "index_projects_on_star_count", using: :btree
   add_index "projects", ["visibility_level"], name: "index_projects_on_visibility_level", using: :btree