I run a Prestashop 184.108.40.206 on a VPS server. The [url removed, login to view] shopping cart suddently got a 15-25 seconds TTFB.
My VPS server memory limit was increased from 125 to 512 MB, but this did not help very much.
I have the same problem with all the other pages, but it is less than 2 seconds.
What I need is my cart to load within 3 seconds and a fix for the high time to first byte for all the other pages would be nice.
I can provide a test site, loaded on the same server as the live site, with a similar size database (synchronized 2 days ago).