Today I launched my new website but it is running very slow.
When I do a speedtest via Google or Pingdom it tells me the slowness is caused by a file named: /wp-admin/admin-ajax.php. This file takes 6 seconds to load...
What can be causing this and how can I solve it?
I run the following plugins:
Wordpress SEO by Yoast
Google Analytics for WordPress by Yoast
W3 Total Cache
WP Live Chat Support Pro
Contact Form 7
The address is http://www.vsbtotaalzorg.nl
Thanks in advance!