Hello,
We have developed an eCommerce with Magento 2.1, using it only as a REST API through or web application.
Recently, after we upgraded from 2.1 to 2.3 version, we are experiencing long TTFB delays on every request we made to the API (more than 4 seconds).
We have tried lots of approaches from database query checking to test requests inside the server local network but did not find the root of the issue yet.
Any ideas on how to fix this kind of issue?
Kind regards
