Plugin load speed

Hi:
http://mysite.com/wp-admin/admin-ajax.php?callback=po_a&popoverajaxaction=popover_selective_ajax&action=popover_selective_ajax&thefrom=http%3A%2F%2Fmysite.com%2F&thereferrer=&active_popover=0&_=1389132680939

Can you tell me what plugin is causing this? Per pingdom.com it is taking like 6 seconds to load. I need to either fix it, deactivate it, or something.

Thanks...

:slight_smile: