diff --git a/pandora_console/include/functions_events.php b/pandora_console/include/functions_events.php
index 8700bce7fb..368e02c028 100644
--- a/pandora_console/include/functions_events.php
+++ b/pandora_console/include/functions_events.php
@@ -1009,15 +1009,31 @@ function events_get_all(
 
     if (!$user_is_admin) {
         // XXX: Confirm there's no extra grants unhandled!.
+        $can_manage = '0 as user_can_manage';
+        if (!empty($EM_groups)) {
+            $can_manage = sprintf(
+                '(tbase.id_grupo IN (%s)) as user_can_manage',
+                join(', ', array_keys($EM_groups))
+            );
+        }
+
+        $can_write = '0 as user_can_write';
+        if (!empty($EW_groups)) {
+            $can_write = sprintf(
+                '(tbase.id_grupo IN (%s)) as user_can_write',
+                join(', ', array_keys($EW_groups))
+            );
+        }
+
         $sql = sprintf(
             'SELECT
                 tbase.*,
-                (tbase.id_grupo IN (%s)) as user_can_manage,
-                (tbase.id_grupo IN (%s)) as user_can_write
+                %s,
+                %s
             FROM
                 (',
-            join(', ', array_keys($EM_groups)),
-            join(', ', array_keys($EW_groups))
+            $can_manage,
+            $can_write
         ).$sql.') tbase';
     } else {
         $sql = 'SELECT
diff --git a/pandora_console/include/functions_ui.php b/pandora_console/include/functions_ui.php
index dda9fa3f0e..9803666c08 100755
--- a/pandora_console/include/functions_ui.php
+++ b/pandora_console/include/functions_ui.php
@@ -3245,7 +3245,8 @@ function ui_print_datatable(array $parameters)
 </script>';
 
     // Order.
-    $output = $filter.$extra.$table.$js;
+    $err_msg = '<div id="error-'.$table_id.'"></div>';
+    $output = $err_msg.$filter.$extra.$table.$js;
 
     ui_require_css_file('datatables.min', 'include/styles/js/');
     ui_require_javascript_file('datatables.min');
diff --git a/pandora_console/include/javascript/pandora_events.js b/pandora_console/include/javascript/pandora_events.js
index 4798927536..dee5498015 100644
--- a/pandora_console/include/javascript/pandora_events.js
+++ b/pandora_console/include/javascript/pandora_events.js
@@ -668,7 +668,7 @@ function show_event_response_command_dialog(id, response, total_checked) {
   });
 }
 
-var processing = 0;
+var processed = 0;
 function update_event(table, id_evento, type, row) {
   var inputs = $("#events_form :input");
   var values = {};
@@ -678,7 +678,6 @@ function update_event(table, id_evento, type, row) {
   });
   var t1 = new Date();
 
-  processing += 1;
   // Update events matching current filters and id_evento selected.
   $.ajax({
     type: "POST",
@@ -691,24 +690,23 @@ function update_event(table, id_evento, type, row) {
       id_evento: id_evento,
       filter: values
     },
-    success: function() {
+    success: function(d) {
+      processed += 1;
       var t2 = new Date();
       var diff_g = t2.getTime() - t1.getTime();
       var diff_s = diff_g / 1000;
-
-      // If operation takes less than 2 seconds, redraw.
-      processing -= 1;
-      if (diff_s < 2) {
-        redraw = true;
-      }
-      if (redraw) {
-        if (processing == 0) {
-          table.draw(false);
+      if (processed >= $(".chk_val:checked").length) {
+        // If operation takes less than 2 seconds, redraw.
+        if (diff_s < 2) {
+          redraw = true;
+        }
+        if (redraw) {
+          table.draw(false);
+        } else {
+          $(row)
+            .closest("tr")
+            .remove();
         }
-      } else {
-        $(row)
-          .closest("tr")
-          .remove();
       }
     }
   });
@@ -731,14 +729,22 @@ function delete_event(table, id_evento, row) {
 
 // Imported from old files.
 function execute_event_response(event_list_btn) {
+  processed = 0;
   $("#max_custom_event_resp_msg").hide();
   $("#max_custom_selected").hide();
 
   var response_id = $("select[name=response_id]").val();
 
+  var total_checked = $(".chk_val:checked").length;
+
+  // Check select an event.
+  if (total_checked == 0) {
+    $("#max_custom_selected").show();
+    return;
+  }
+
   if (!isNaN(response_id)) {
     // It is a custom response
-
     var response = get_response(response_id);
 
     // If cannot get response abort it
@@ -746,16 +752,8 @@ function execute_event_response(event_list_btn) {
       return;
     }
 
-    var total_checked = $(".chk_val:checked").length;
-
-    // Check select an event.
-    if (total_checked == 0) {
-      $("#max_custom_selected").show();
-      return;
-    }
-
     // Limit number of events to apply custom responses
-    // to for performance reasons.
+    // due performance reasons.
     if (total_checked > $("#max_execution_event_response").val()) {
       $("#max_custom_event_resp_msg").show();
       return;
@@ -801,30 +799,32 @@ function execute_event_response(event_list_btn) {
     }
   } else {
     // It is not a custom response
+    var delay = 5000;
+    var $i = 0;
     switch (response_id) {
       case "in_progress_selected":
-        $(".chk_val").each(function() {
-          if ($(this).is(":checked")) {
-            in_process_event(dt_events, $(this).val(), this.parentElement);
-          }
+        $(".chk_val:checked").each(function() {
+          setTimeout(
+            in_process_event(dt_events, $(this).val(), this.parentElement),
+            total_checked * delay * $i++
+          );
         });
-        dt_events.draw(false);
         break;
       case "validate_selected":
-        $(".chk_val").each(function() {
-          if ($(this).is(":checked")) {
-            validate_event(dt_events, $(this).val(), this.parentElement);
-          }
+        $(".chk_val:checked").each(function() {
+          setTimeout(
+            validate_event(dt_events, $(this).val(), this.parentElement),
+            total_checked * delay * $i++
+          );
         });
-        dt_events.draw(false);
         break;
       case "delete_selected":
-        $(".chk_val").each(function() {
-          if ($(this).is(":checked")) {
-            delete_event(dt_events, $(this).val(), this.parentElement);
-          }
+        $(".chk_val:checked").each(function() {
+          setTimeout(
+            delete_event(dt_events, $(this).val(), this.parentElement),
+            total_checked * delay * $i++
+          );
         });
-        dt_events.draw(false);
         break;
     }
   }
@@ -839,28 +839,20 @@ function check_massive_response_event(
   var counter = 0;
   var end = 0;
 
-  $(".chk_val").each(function() {
-    if ($(this).is(":checked")) {
-      var event_id = $(this).val();
-      var server_id = $("#hidden-server_id_" + event_id).val();
-      response["target"] = get_response_target(
-        event_id,
-        response_id,
-        server_id,
-        response_command
-      );
+  $(".chk_val:checked").each(function() {
+    var event_id = $(this).val();
+    var server_id = $("#hidden-server_id_" + event_id).val();
+    response["target"] = get_response_target(
+      event_id,
+      response_id,
+      server_id,
+      response_command
+    );
 
-      if (total_checked - 1 === counter) end = 1;
+    if (total_checked - 1 === counter) end = 1;
 
-      show_massive_response_dialog(
-        event_id,
-        response_id,
-        response,
-        counter,
-        end
-      );
+    show_massive_response_dialog(event_id, response_id, response, counter, end);
 
-      counter++;
-    }
+    counter++;
   });
 }
diff --git a/pandora_console/operation/events/event_statistics.php b/pandora_console/operation/events/event_statistics.php
index 437ec0f47c..a4a5b1632a 100644
--- a/pandora_console/operation/events/event_statistics.php
+++ b/pandora_console/operation/events/event_statistics.php
@@ -1,30 +1,48 @@
 <?php
+/**
+ * Event statistics.
+ *
+ * @category   Statistics view.
+ * @package    Pandora FMS
+ * @subpackage Events.
+ * @version    1.0.0
+ * @license    See below
+ *
+ *    ______                 ___                    _______ _______ ________
+ *   |   __ \.-----.--.--.--|  |.-----.----.-----. |    ___|   |   |     __|
+ *  |    __/|  _  |     |  _  ||  _  |   _|  _  | |    ___|       |__     |
+ * |___|   |___._|__|__|_____||_____|__| |___._| |___|   |__|_|__|_______|
+ *
+ * ============================================================================
+ * Copyright (c) 2005-2019 Artica Soluciones Tecnologicas
+ * Please see http://pandorafms.org for full contribution list
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation for version 2.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * ============================================================================
+ */
 
-// Pandora FMS - http://pandorafms.com
-// ==================================================
-// Copyright (c) 2005-2010 Artica Soluciones Tecnologicas
-// Please see http://pandorafms.org for full contribution list
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// as published by the Free Software Foundation for version 2.
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-// Load global vars
+// Begin.
 global $config;
 
 require_once $config['homedir'].'/include/functions_graph.php';
 
 check_login();
 
-if (! check_acl($config['id_user'], 0, 'ER') && ! check_acl($config['id_user'], 0, 'EW') && ! check_acl($config['id_user'], 0, 'EM')) {
+if (! check_acl($config['id_user'], 0, 'ER')
+    && ! check_acl($config['id_user'], 0, 'EW')
+    && ! check_acl($config['id_user'], 0, 'EM')
+) {
     db_pandora_audit('ACL Violation', 'Trying to access event viewer');
     include 'general/noaccess.php';
     return;
 }
 
-// header
+// Header.
 ui_print_page_header(__('Statistics'), 'images/op_events.png', false, false);
 echo '<table width=95%>';
 
diff --git a/pandora_console/operation/events/events.php b/pandora_console/operation/events/events.php
index 8fa3963d6a..f8e53ab7d1 100644
--- a/pandora_console/operation/events/events.php
+++ b/pandora_console/operation/events/events.php
@@ -93,7 +93,7 @@ $text_agent = get_parameter('filter[text_agent]');
 $id_agent = get_parameter('filter[id_agent]');
 $id_agent_module = get_parameter('filter[id_agent_module]');
 $pagination = get_parameter('filter[pagination]');
-$event_view_hr = get_parameter('filter[event_view_hr]', 8);
+$event_view_hr = get_parameter('filter[event_view_hr]', $config['event_view_hr']);
 $id_user_ack = get_parameter('filter[id_user_ack]');
 $group_rep = get_parameter('filter[group_rep]', 1);
 $tag_with = get_parameter('filter[tag_with]', []);
@@ -1034,6 +1034,13 @@ $filter .= ui_toggle(
 );
 
 try {
+    $checkbox_all = html_print_checkbox(
+        'all_validate_box',
+        1,
+        false,
+        true
+    );
+
     $default_fields = [
         'evento',
         'id_evento',
@@ -1070,7 +1077,7 @@ try {
             'class' => 'action_buttons w120px',
         ],[
             'text'  => 'm',
-            'extra' => "<input name='all_validate_box' type='checkbox' value='1' id='checkbox-all_validate_box' />",
+            'extra' => $checkbox_all,
             'class' => 'w20px',
         ],
     ];
@@ -1090,7 +1097,7 @@ try {
                 'class' => 'action_buttons w120px',
             ],[
                 'text'  => 'm',
-                'extra' => "<input name='all_validate_box' type='checkbox' value='1' id='checkbox-all_validate_box' />",
+                'extra' => $checkbox_all,
                 'class' => 'w20px no-text-imp',
             ],
         ]
@@ -1298,7 +1305,6 @@ html_print_input_hidden(
 echo "<div id='event_details_window'></div>";
 echo "<div id='event_response_window'></div>";
 echo "<div id='event_response_command_window' title='".__('Parameters')."'></div>";
-echo "<div id='error-".$table_id."'></div>";
 
 // Load filter div for dialog.
 echo '<div id="load-modal-filter" style="display: none"></div>';