Dle takes a long time to load?

Question

DLE

There are a lot of files on the site and the site really takes a long time to load.
Reason established.
There are about 3000 news on my site - it takes a long time to load. I connected the database with only 20 articles and the site started to load quickly again, as before.

How to speed up Dle website with 3000 content?

It costs debian, 4 operatives, I don’t remember the percentage, 2 cores. There is only one site on it. Picked ispmanager settings, did not understand anything.