- Issue #1829400 by pfrenssen: Convert the 'maximum_replication_lag()' variable to CMI.

core/includes/database.inc

@@ -905,7 +905,7 @@ function db_ignore_slave() {
     // Five minutes is long enough to allow the slave to break and resume
     // interrupted replication without causing problems on the Drupal site from
     // the old data.
-    $duration = variable_get('maximum_replication_lag', 300);
+    $duration = config('system.performance')->get('maximum_replication_lag');
     // Set session variable with amount of time to delay before using slave.
     $_SESSION['ignore_slave_server'] = REQUEST_TIME + $duration;
   }

core/modules/system/config/system.performance.yml

@@ -2,6 +2,7 @@ cache:
   page:
     enabled: '0'
     max_age: '0'
+maximum_replication_lag: '300'
 preprocess:
   css: '0'
   js: '0'

core/modules/system/system.install

@@ -1905,6 +1905,7 @@ function system_update_8016() {
 function system_update_8017() {
   update_variables_to_config('system.performance', array(
     'cache' => 'cache.page.enabled',
+    'maximum_replication_lag' => 'maximum_replication_lag',
     'page_cache_maximum_age' => 'cache.page.max_age',
     'page_compression' => 'response.gzip',
     'preprocess_css' => 'preprocess.css',