diff --git a/core/includes/batch.inc b/core/includes/batch.inc
index 9f521a4..c6a8578 100644
--- a/core/includes/batch.inc
+++ b/core/includes/batch.inc
@@ -298,11 +298,11 @@ function _batch_process() {
       else {
         $maximum_memory = ini_get('memory_limit');
       }
-      // Limit to 80% memory use.
-      $max_bytes = \Drupal\Component\Utility\Bytes::toInt($maximum_memory) * 0.8;
+      // Limit to 60% memory use.
+      $max_bytes = \Drupal\Component\Utility\Bytes::toInt($maximum_memory) * 0.6;
 
       // If we are in progressive mode, break processing after 1 second or using
-      // 80% of available memory.
+      // 60% of available memory.
       if (Timer::read('batch_processing') > 1000 || memory_get_usage(TRUE) > $max_bytes) {
         // Record elapsed wall clock time.
         $current_set['elapsed'] = round((microtime(TRUE) - $current_set['start']) * 1000, 2);