I set up Magento CE 1.9 on Synology DS 1515+(DSM version: 5.2).
There are two websites, one of which has 364 products, the other has none.
Recently, when I add a product to cart as a registered customer, it takes more than two minutes to respond.
If I add a product to cart as a visitor, it responds fast.
I've enlarged memories of PHP runtime and Mariadb, but there is no improvement.
Does it need to adjust any other places to improve performance?