diff --git a/dev/Settings/Admin/About.js b/dev/Settings/Admin/About.js
index 03801fce5..52208119f 100644
--- a/dev/Settings/Admin/About.js
+++ b/dev/Settings/Admin/About.js
@@ -16,6 +16,9 @@ export class AdminSettingsAbout /*extends AbstractViewSettings*/ {
 			coreWarning: false,
 			coreVersion: '',
 			coreVersionCompare: -2,
+			load1: 0,
+			load5: 0,
+			load15: 0,
 			errorDesc: ''
 		});
 		this.coreChecking = ko.observable(false).extend({ throttle: 100 });
@@ -51,18 +54,21 @@ export class AdminSettingsAbout /*extends AbstractViewSettings*/ {
 	}
 
 	onBuild() {
-		Remote.request('AdminPHPExtensions', (iError, data) => iError || this.phpextensions(data.Result));
-
 //	beforeShow() {
 		this.coreChecking(true);
-		Remote.request('AdminUpdateInfo', (iError, data) => {
+		Remote.request('AdminInfo', (iError, data) => {
 			this.coreChecking(false);
-			if (!iError && data?.Result) {
+			data = data?.Result;
+			if (!iError && data) {
+				this.load1(data.system.load?.[0]);
+				this.load5(data.system.load?.[1]);
+				this.load15(data.system.load?.[2]);
+				this.phpextensions(data.php);
 				this.coreReal(true);
-				this.coreUpdatable(!!data.Result.updatable);
-				this.coreWarning(!!data.Result.warning);
-				this.coreVersion(data.Result.version || '');
-				this.coreVersionCompare(data.Result.versionCompare);
+				this.coreUpdatable(!!data.core.updatable);
+				this.coreWarning(!!data.core.warning);
+				this.coreVersion(data.core.version || '');
+				this.coreVersionCompare(data.core.versionCompare);
 			} else {
 				this.coreReal(false);
 				this.coreWarning(false);
diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/ActionsAdmin.php b/snappymail/v/0.0.0/app/libraries/RainLoop/ActionsAdmin.php
index ac3d3f1a0..7097cf106 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/ActionsAdmin.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/ActionsAdmin.php
@@ -205,40 +205,6 @@ class ActionsAdmin extends Actions
 			: false);
 	}
 
-	public function DoAdminPHPExtensions() : array
-	{
-		$aResult = [
-			[
-				'name' => 'PHP ' . PHP_VERSION,
-				'loaded' => true,
-				'version' => PHP_VERSION
-			],
-			[
-				'name' => 'PHP 64bit',
-				'loaded' => PHP_INT_SIZE == 8,
-				'version' => PHP_INT_SIZE
-			]
-		];
-		foreach (['APCu', 'cURL','GnuPG','GD','Gmagick','Imagick','iconv','intl','LDAP','OpenSSL','pdo_mysql','pdo_pgsql','pdo_sqlite','redis','Sodium','Tidy','uuid','XXTEA','Zip'] as $name) {
-			$aResult[] = [
-				'name' => ('OpenSSL' === $name && \defined('OPENSSL_VERSION_TEXT')) ? OPENSSL_VERSION_TEXT : $name,
-				'loaded' => \extension_loaded(\strtolower($name)),
-				'version' => \phpversion($name)
-			];
-		}
-		$aResult[] = [
-			'name' => 'Fileinfo',
-			'loaded' => \class_exists('finfo'),
-			'version' => \phpversion('fileinfo')
-		];
-		$aResult[] = [
-			'name' => 'Phar',
-			'loaded' => \class_exists('PharData'),
-			'version' => \phpversion('phar')
-		];
-		return $this->DefaultResponse($aResult);
-	}
-
 	// /?admin/Backup
 	public function DoAdminBackup() : void
 	{
@@ -261,7 +227,7 @@ class ActionsAdmin extends Actions
 		exit;
 	}
 
-	public function DoAdminUpdateInfo() : array
+	public function DoAdminInfo() : array
 	{
 		$this->IsAdminLoggined();
 
@@ -294,13 +260,50 @@ class ActionsAdmin extends Actions
 			$aWarnings[] = 'Can not edit: ' . APP_INDEX_ROOT_PATH . 'index.php';
 		}
 
-		return $this->DefaultResponse(array(
-			 'updatable' => \SnappyMail\Repository::canUpdateCore(),
-			 'warning' => $bShowWarning,
-			 'version' => $sVersion,
-			 'versionCompare' => \version_compare(APP_VERSION, $sVersion),
-			 'warnings' => $aWarnings
-		));
+		$aResult = [
+			'system' => [
+				'load' => \is_callable('sys_getloadavg') ? \sys_getloadavg() : null
+			],
+			'core' => [
+				 'updatable' => \SnappyMail\Repository::canUpdateCore(),
+				 'warning' => $bShowWarning,
+				 'version' => $sVersion,
+				 'versionCompare' => \version_compare(APP_VERSION, $sVersion),
+				 'warnings' => $aWarnings
+			],
+			'php' => [
+				[
+					'name' => 'PHP ' . PHP_VERSION,
+					'loaded' => true,
+					'version' => PHP_VERSION
+				],
+				[
+					'name' => 'PHP 64bit',
+					'loaded' => PHP_INT_SIZE == 8,
+					'version' => PHP_INT_SIZE
+				]
+			]
+		];
+
+		foreach (['APCu', 'cURL','GnuPG','GD','Gmagick','Imagick','iconv','intl','LDAP','OpenSSL','pdo_mysql','pdo_pgsql','pdo_sqlite','redis','Sodium','Tidy','uuid','XXTEA','Zip'] as $name) {
+			$aResult['php'][] = [
+				'name' => ('OpenSSL' === $name && \defined('OPENSSL_VERSION_TEXT')) ? OPENSSL_VERSION_TEXT : $name,
+				'loaded' => \extension_loaded(\strtolower($name)),
+				'version' => \phpversion($name)
+			];
+		}
+		$aResult['php'][] = [
+			'name' => 'Fileinfo',
+			'loaded' => \class_exists('finfo'),
+			'version' => \phpversion('fileinfo')
+		];
+		$aResult['php'][] = [
+			'name' => 'Phar',
+			'loaded' => \class_exists('PharData'),
+			'version' => \phpversion('phar')
+		];
+
+		return $this->DefaultResponse($aResult);
 	}
 
 	public function DoAdminUpgradeCore() : array
diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php b/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php
index 0bcbeabda..8de03de9c 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php
@@ -19,12 +19,12 @@ class Application extends \RainLoop\Config\AbstractConfig
 		$bResult = parent::Load();
 
 		$max = \floatval($this->Get('security', 'max_sys_getloadavg', 0));
-		if ($max && \function_exists('sys_getloadavg')) {
+		if ($max && \is_callable('sys_getloadavg')) {
 			$load = \sys_getloadavg();
 			if ($load && $load[0] > $max) {
-				\header('HTTP/1.1 503 Service Unavailable');
+				\header('HTTP/1.1 503 Service Unavailable', true, 503);
 				\header('Retry-After: 120');
-				exit('Mailserver too busy. Please try again later.');
+				exit("Mailserver too busy ({$load[0]}). Please try again later.");
 			}
 		}
 
diff --git a/snappymail/v/0.0.0/app/templates/Views/Admin/AdminSettingsAbout.html b/snappymail/v/0.0.0/app/templates/Views/Admin/AdminSettingsAbout.html
index 656120ba7..0dba1b4dd 100644
--- a/snappymail/v/0.0.0/app/templates/Views/Admin/AdminSettingsAbout.html
+++ b/snappymail/v/0.0.0/app/templates/Views/Admin/AdminSettingsAbout.html
@@ -51,6 +51,23 @@
 				</div>
 			</div>
 
+			<h3>System</h3>
+			<table class="table table-hover table-bordered"><tbody>
+				<tr>
+					<td>Average load past minute</td>
+					<td data-bind="text: load1"></td>
+				</tr>
+				<tr>
+					<td>Average load past 5 minutes</td>
+					<td data-bind="text: load5"></td>
+				</tr>
+				<tr>
+					<td>Average load past 15 minutes</td>
+					<td data-bind="text: load15"></td>
+				</tr>
+			</tbody>
+			</table>
+
 			<h3>PHP optional extensions</h3>
 			<table class="table table-hover table-bordered"><thead><tr>
 				<th>Extension</th>