7 uses of MAINTENANCE_MODE

drupal_flush_all_caches in drupal-6.x/includes/common.inc
Flush all cached data on the site.
drupal_get_css in drupal-6.x/includes/common.inc
Returns a themed representation of all stylesheets that should be attached to the page.
drupal_get_js in drupal-6.x/includes/common.inc
Returns a themed presentation of all JavaScript code for the current page.
drupal_goto in drupal-6.x/includes/common.inc
Send the user to a different Drupal page.
update_flush_caches in drupal-6.x/modules/update/update.module
Implementation of hook_flush_caches().
_drupal_bootstrap_full in drupal-6.x/includes/common.inc
_drupal_maintenance_theme in drupal-6.x/includes/theme.maintenance.inc
Sets up the theming system for site installs, updates and when the site is in off-line mode. It also applies when the database is unavailable.