Nop Commerce Speed Issue

Current my shop contains 600000 products in database.
Now its speed is very poor.
Please advice how can i boost up site speed. I'm using nopcommerce 1.8 version.

Hi vikasus,

put here your commerce url. I will check it.

Do you followed the suggested tricks  here:

https://www.nopcommerce.com/boards/t/5723/slow-manage-products-section-in-admin-area-v16-17.aspx?p=2

?

My site url is
http://shop.geninf.com