Adding products to cart extremly slow (but only for loggedin users)
since some days our websites (multishop installation) have some serious performance problems. No patches, no modules were installed for a longer time.
Adding products to cart is extremly slow if a user is logged in. If you are not logged in, everything runs fast. Same issues for logedin customers on the checkout page. If a customer calls the page checkout, everything loads fine, but the ajax call is extremly slow. (127 seconds for saving the order) Changing the address => 127 seconds to wait till ajax call returns OK Same issue in the backend when generating an order and checking for the available shipments.
I turned on the profiler to see what happens Everything is fine (Time < 0.2) except