diff --git a/scheduler.install b/scheduler.install
index 6462e60..bcd15ae 100644
--- a/scheduler.install
+++ b/scheduler.install
@@ -51,6 +51,7 @@ function scheduler_uninstall() {
     'scheduler_date_format',
     'scheduler_field_type',
     'scheduler_extra_info',
+    'scheduler_watchdog_log',
   );
 
   $types = node_type_get_types();
diff --git a/scheduler.module b/scheduler.module
index 559c476..3512fa7 100644
--- a/scheduler.module
+++ b/scheduler.module
@@ -895,7 +895,10 @@ function scheduler_theme() {
 }
 
 function _scheduler_run_cron() {
-  watchdog('scheduler', 'Internal scheduler cron run activated', array(), WATCHDOG_NOTICE);
+  $log = variable_get('scheduler_watchdog_log', 1);
+  if ($log) {
+    watchdog('scheduler', 'Internal scheduler cron run activated', array(), WATCHDOG_NOTICE);
+  }
   scheduler_cron();
   if (ob_get_level() > 0) {
     $handlers = ob_list_handlers();
@@ -903,7 +906,9 @@ function _scheduler_run_cron() {
       ob_clean();
     }
   }
-  watchdog('scheduler', 'Internal scheduler cron run completed', array(), WATCHDOG_NOTICE, l('settings', 'admin/config/content/scheduler'));
+  if ($log) {
+    watchdog('scheduler', 'Internal scheduler cron run completed', array(), WATCHDOG_NOTICE, l('settings', 'admin/config/content/scheduler'));
+  }
 
   // This message is only seen when the lightweight cron is tested interactively.
   drupal_set_message(t("Scheduler's lightweight cron completed. See !log for details.", array('!log' => l('admin/reports/dblog', 'admin/reports/dblog'))));
@@ -925,7 +930,18 @@ function _scheduler_lightweight_cron() {
     '#submit' => array('_scheduler_run_cron'),
     '#suffix' => "</div>\n",
   );
-  return $form;
+  $form['scheduler_cron_settings'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Lightweight cron settings'),
+  );
+  $form['scheduler_cron_settings']['scheduler_watchdog_log'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Log activation and completion messages'),
+    '#default_value' => variable_get('scheduler_watchdog_log', 1),
+    '#description' => t("If checked, entries will appear in the dblog each time scheduler's cron process is started and completed. This is useful when setting up and testing scheduler's cron, but can result in a large amount of dblog entries. You might want to disable this setting once you've verified that scheduler's cron is running correctly."),
+  );
+
+  return system_settings_form($form);;
 }
 
 /**