The batch processed all the items, and when i should see the finish message, i see the error "Allowed memory size of 536870912 bytes exhausted".

When i debug the code i have noticed that Drupal loading each proccesed block on butch finish (ContentEntityBase->__construct). So i can’t figure out why Drupal Doing it.

The structure of code: This i sa custom module with form class, and batch functions in the custom_module.module file. On form submit the module call the create batch function:

public function submitForm(array &$form, FormStateInterface $form_state) {   custom_module_make_batch(); } 

The custom_module_build_batch function getting ids of custom blocks (4000 or more) and generating the batch:

function custom_module_make_batch() {    $batch = [];    $items = get_blocks_ids();    $batch = custom_module_generate_batch($items);   batch_set($batch); }  function custom_module_generate_batch($items) {    $operations = [];    $operations_groups = array_chunk($items, 50);    foreach ($operations_groups as $key => $operations_group) {     $operations[] = [       'custom_module_batch_op',       [$operations_group],     ];   }    $batch = [     'operations' => $operations,     'finished' => 'custom_module_batch_finished',     'title' => 'Custom batch',     'init_message' => 'Batch is starting.',     'progress_message' => 'Processed @current out of @total parts.',     'error_message' => 'Batch has encountered an error.',   ];   return $batch; }  function custom_module_batch_op($operations_group, &$context) {    foreach ($operations_group as $key => $bid) {        $block = Drupal::service('entity.repository')->loadEntityByUuid('block_content', $bid);      $block->field_name = $new_value;          $block->save();   }  }  function custom_module_batch_finished($success, $results, $operations) {    $messenger = Drupal::messenger();   if ($success) {     // Here we could do something meaningful with the results.     // We just display the number of nodes we processed...      if ($total) {       $messenger->addMessage(t('@count results processed.', ['@count' => $total]));     } else {       $messenger->addMessage(t('There no items for the migration'));     }    } else {     // An error occurred.     // $operations contains the operations that remained unprocessed.     $error_operation = reset($operations);     $messenger->addMessage(       t(         'An error occurred while processing @operation with arguments : @args',         [           '@operation' => $error_operation[0],           '@args' => print_r($error_operation[0], TRUE),         ]       )     );   } }