New Relic is a website performance monitoring service that can enable you to determine where bottlenecks exist in your Cloud Platform application. After sufficient traffic is requested from that environment, New Relic will begin to analyze the available data.

If you have an Acquia Site Factory application, you can also have New Relic report data on a per-website basis, which requires that each website have its own unique New Relic App name. (New Relic's PHP API contains a call for setting your app name.) This data is available only for the environment as a whole, and you view it by selecting the appropriate sitename.env option from the list of available applications (for example, mysite.01live.)

To enable New Relic monitoring in a multisite environment, like Site Factory, create a post-settings.php script named new_relic.php containing the following code, replacing <CURRENT_APP_NAME> with the name of your application:

if (extension_loaded('newrelic')) {
  $env = 'local';

  if (isset($_ENV['AH_SITE_ENVIRONMENT'])) {
    $env = $_ENV['AH_SITE_ENVIRONMENT'];
  }

  global $_acsf_site_name;
  newrelic_set_appname("<current_app_name>.$env.$_acsf_site_name; <current_app_name>.$env", '', 'true');
}