In function faceted_search_ui_stage_results in faceted_search_ui.module there are a few lines of codes which really do not add anything useful to the faceted search-functionality. It just fills up the Drupal log-table. At some of our sites, 99% of the log table is from these lines. I comment out the code on every new installation. Would be nice if they were removed completely.

Refereing to this code, from line #373 in faceted_search_ui.module:

  if ($text) {
    // Log the search text.
    $path = faceted_search_ui_build_path($env, $env->ui_state, $text);
    watchdog('faceted_search', '%text.', array('%text' => $text), WATCHDOG_NOTICE, l(t('results'), $path));
  }