- Patch #1591412 by andypost, swentel, cosmicdreams, sun: convert tracker...

- Patch #1591412 by andypost, swentel, cosmicdreams, sun: convert tracker settings to configuration system.

core/modules/tracker/config/tracker.settings.yml

+cron_index_limit: 1000

core/modules/tracker/tracker.install

@@ -10,7 +10,6 @@
  */
 function tracker_uninstall() {
   variable_del('tracker_index_nid');
-  variable_del('tracker_batch_size');
 }
 
 /**
@@ -116,3 +115,23 @@ function tracker_schema() {
 
   return $schema;
 }
+
+/**
+ * @defgroup updates-7.x-to-8.x Updates from 7.x to 8.x
+ * @{
+ * Update functions from 7.x to 8.x.
+ */
+
+/**
+ * Moves tracker settings from variable to config.
+ */
+function tracker_update_8000() {
+  update_variables_to_config('tracker.settings', array(
+    'tracker_batch_size' => 'cron_index_limit',
+  ));
+}
+
+/**
+ * @} End of "defgroup updates-7.x-to-8.x".
+ * The next series of updates should start at 9000.
+ */

core/modules/tracker/tracker.module

@@ -80,7 +80,7 @@ function tracker_menu() {
  */
 function tracker_cron() {
   $max_nid = variable_get('tracker_index_nid', 0);
-  $batch_size = variable_get('tracker_batch_size', 1000);
+  $batch_size = config('tracker.settings')->get('cron_index_limit');
   if ($max_nid > 0) {
     $last_nid = FALSE;
     $result = db_query_range('SELECT nid, uid, status FROM {node} WHERE nid <= :max_nid ORDER BY nid DESC', 0, $batch_size, array(':max_nid' => $max_nid), array('target' => 'slave'));