ansible/roles/drupal#24 Optimize MySQL performance for Drupal

templates/settings.docker.php.twig

@@ -23,6 +23,9 @@ $databases = array(
       'host' => 'mariadb',
       'port' => '3306',
       'prefix' => '',
+      'init_commands' => [
+        'tx_level' => "SET TRANSACTION ISOLATION LEVEL READ COMMITTED;",
+      ],
     ),
   ),
 );
@@ -42,6 +45,9 @@ $databases = array(
       'password' => 'drupal',
       'database' => 'drupal',
       'prefix' => '',
+      'init_commands' => [
+        'tx_level' => "SET TRANSACTION ISOLATION LEVEL READ COMMITTED;",
+      ],
     ),
   ),
 );