add notification on admin page

settings/admin.php

@@ -88,6 +88,11 @@ $tmpl->assign('forms', array());
 foreach($forms as $form) {
 	$tmpl->append('forms', $form);
 }
+
+// TODO - replace by:
+// > 5 users OR > 1000 files
+$tmpl->assign('databaseOverload', true);
+
 $tmpl->printPage();
 
 /**

settings/templates/admin.php

@@ -98,6 +98,20 @@ if (!$_['isAnnotationsWorking']) {
 <?php
 }
 
+// SQLite database performance issue
+if ($_['databaseOverload']) {
+	?>
+<div class="section">
+	<h2><?php p($l->t('Database Performance Warning'));?></h2>
+
+	<span class="securitywarning">
+		<?php p($l->t('SQLite will be used as database. For larger installations we recommend to change this.')); ?>
+	</span>
+
+</div>
+<?php
+}
+
 // if module fileinfo available?
 if (!$_['has_fileinfo']) {
 	?>