Dividing the site into several. Is it worth it?

Question

Search Engine Optimization

Good afternoon friends.
There is a site with a huge catalog of goods. The site has more than 40,000 products and 300 categories. The engine cannot cope, the load on the database is very large and the site slows down both in the public part and in the admin panel.
I want to know the opinions of experts on the topic of dividing the site into several smaller ones, is it worth it at all or trying to optimize something.
In general, I think to divide the site into several on subdomains with the same design, but different products and catalogs.

Answer 1

There is a site with a huge catalog of goods.

huge is when a few million, you have a tiny one.
it is necessary to optimize - "40,000 products and 300 categories" is nothing at all. Here you also need to specify the number of visitors to the site. Since the load depends on them for the most part than on the size of the base.
It's a guillotine headache cure
Of course it's worth it, but optimizing a site and dividing it into several are completely different things. What engine?

Answer 2

Well, you will create a carload of work for both moving and SEO.
If you can quickly and easily optimize the side server with a good admin, then there is no point in sharing