It is important that you stay on top of your Drupal website's CRON feature and make sure that it is functioning well, and on a normal schedule, otherwise you can end up some serious database issues. Namely, the size of your drupal database can grow into the gigabytes, affecting the performance of your drupal site as well as the server it runs on. When cron is not running on a regular basis, your Drupal site's tasks begin to queue up, and in turn your database begins to grow and can quickly grow into the gigabytes making moving your site and it's contents from one server to another a painstaking task. To stay on top of your cron system it begins with installation, and making sure that it is done correctly. Learn the ins and outs here https://drupal.org/cron.