Slow Site Need Help 3.8

Hello,

My Nop site has slowly decreased in speed over the pass few months.

We have 797068 products and 2200 categories so a lot of attributes and pictures.

Server spec is 64gb RAM and an Intel Xeon CPU E5.

We use a Nop-templates theme and a few of their plugins, 5/6 at most.

We have made some tweaks to Nop but nothing in the core.

I'm not sure if it's the database or the server speed but I assume it's the database, I have read most posts on the site and tried everything that I can do myself.

Site url is https://www.wallart-direct.co.uk/abstract-canvas-art-prints

We can pay for assistance but would like to see if anyone has anything else I can try before that route.

Thanks

Be sure that your categories and products are coming via SQL stored procedure as well as you have to implement caching as well if there is not already by this way you can increase your site's overall speed. Feel free to ask further query directly to me I will be happy to help you.