as this overload is caused by regular requests (although those requests are coming sometimes in a big amount), there is nothing a control panel can detect about them.

The requests to xmlrpc.php are a quite common problem - and are not solved by deleting that file, as then the requests are redirected to the index.php and overloading your site again.


Here you will find a strategie how to protect yourself with a simple rule in the .htaccess of your WordPress installation:

http://perishablepress.com/wordpress-xmlrpc-pingback-vulnerability/


For more information, you can start reading here:

https://www.google.com/webhp?ie=UTF-8#q=secure%20xmlrpc%20.htaccess

Voorbeeld voor in uw htaccess:

# protect xmlrpc
<Files xmlrpc.php>
	Order Deny,Allow
	Deny from all
</Files>