Add index to the project_registry table

db/geo/migrate/20170627195211_add_index_to_project_registry.rb

+class AddIndexToProjectRegistry < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :project_registry, :last_repository_synced_at
+    add_concurrent_index :project_registry, :last_repository_successful_sync_at
+    add_concurrent_index :project_registry, :resync_repository
+    add_concurrent_index :project_registry, :resync_wiki
+  end
+
+  def down
+    remove_concurrent_index :project_registry, :last_repository_synced_at if index_exists?(:project_registry, :last_repository_synced_at)
+    remove_concurrent_index :project_registry, :last_repository_successful_sync_at if index_exists?(:project_registry, :last_repository_successful_sync_at)
+    remove_concurrent_index :project_registry, :resync_repository if index_exists?(:project_registry, :resync_repository)
+    remove_concurrent_index :project_registry, :resync_wiki if index_exists?(:project_registry, :resync_wiki)
+  end
+end

db/geo/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170614201943) do
+ActiveRecord::Schema.define(version: 20170627195211) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -41,6 +41,10 @@ ActiveRecord::Schema.define(version: 20170614201943) do
     t.datetime "last_wiki_successful_sync_at"
   end
 
+  add_index "project_registry", ["last_repository_successful_sync_at"], name: "index_project_registry_on_last_repository_successful_sync_at", using: :btree
+  add_index "project_registry", ["last_repository_synced_at"], name: "index_project_registry_on_last_repository_synced_at", using: :btree
   add_index "project_registry", ["project_id"], name: "index_project_registry_on_project_id", using: :btree
+  add_index "project_registry", ["resync_repository"], name: "index_project_registry_on_resync_repository", using: :btree
+  add_index "project_registry", ["resync_wiki"], name: "index_project_registry_on_resync_wiki", using: :btree
 
 end