Len Swaneveld
--- a/core/modules/views/config/install/views.settings.yml
+++ b/core/modules/views/config/install/views.settings.yml
    default_display: false
    performance_statistics: false
    preview_information: true
+    live_preview_limit: 50
--- a/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
+++ b/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
   * Returns the limit of the query.
   */
  public function getLimit() {
+    // Prevent of crash on live preview with large sets.
--- a/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
+++ b/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
   * Returns the limit of the query.
   */
  public function getLimit() {
+    // Prevent of crash on live preview with large sets.
+    if (!empty($this->view->live_preview)) {
+      $live_preview_limit = \Drupal::ConfigFactory()->get('views.settings')->get('ui.show.live_preview_limit') ?: 50;
+      if (empty($this->limit) || $this->limit > $live_preview_limit) {
+        $options = [
+          '%limit' => !empty($this->limit) ? $this->limit : '',
+          '%live_preview_limit' => $live_preview_limit,
+        ];
+        $message = $this->t('Limit of results is not set. The live preview has a limit of %live_preview_limit items per page.', $options);
--- a/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
+++ b/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
   * Returns the limit of the query.
   */
  public function getLimit() {
+    // Prevent of crash on live preview with large sets.
+    if (!empty($this->view->live_preview)) {
+      $live_preview_limit = \Drupal::ConfigFactory()->get('views.settings')->get('ui.show.live_preview_limit') ?: 50;
+      if (empty($this->limit) || $this->limit > $live_preview_limit) {
--- a/core/modules/views_ui/tests/src/Functional/PreviewTest.php
+++ b/core/modules/views_ui/tests/src/Functional/PreviewTest.php
+      $record = [
+        'name' => $this->randomString(12),
+        'age' => 50,
+        'job' => $this->randomString(32),
+        'created' => gmmktime(0, 0, 0, 1, 1, 2000),
+        'status' => 1,
+      ];
+      $query->values($record);
+    }
+    $query->execute();
+
+    // Test display all items.
+    $this->drupalGet('admin/structure/views/nojs/display/test_preview/default/pager');
+    $this->submitForm($edit = ['pager[type]' => 'none'], 'Apply');
+    $this->drupalGet('admin/structure/views/view/test_preview/edit');
+    $this->submitForm($edit = [], t('Save'));
--- a/core/modules/views_ui/tests/src/Functional/PreviewTest.php
+++ b/core/modules/views_ui/tests/src/Functional/PreviewTest.php
    $this->assertCount(0, $this->xpath('//div[@id="views-live-preview"]//b[text()=:text]', [':text' => 'Test preview title']));
  }

+  /**
+   * Tests the live preview limit.
+   */
+  public function testPreviewLimit() {
+    $live_preview_limit = \Drupal::ConfigFactory()->get('views.settings')->get('ui.show.live_preview_limit') ?: 50;