recalculate SiteStatistics

db/post_migrate/20180826111825_recalculate_site_statistics.rb

+# frozen_string_literal: true
+
+class RecalculateSiteStatistics < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    transaction do
+      execute('SET LOCAL statement_timeout TO 0') if Gitlab::Database.postgresql? # see https://gitlab.com/gitlab-org/gitlab-ce/issues/48967
+
+      execute("UPDATE site_statistics SET repositories_count = (SELECT COUNT(*) FROM projects)")
+    end
+
+    transaction do
+      execute('SET LOCAL statement_timeout TO 0') if Gitlab::Database.postgresql? # see https://gitlab.com/gitlab-org/gitlab-ce/issues/48967
+
+      execute("UPDATE site_statistics SET wikis_count = (SELECT COUNT(*) FROM project_features WHERE wiki_access_level != 0)")
+    end
+  end
+
+  def down
+    # No downside in keeping the counter up-to-date
+  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: 20180816193530) do
+ActiveRecord::Schema.define(version: 20180826111825) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"