Why are there so many threads in linix?

Question

linux

Hello dear experts.
Recently I noticed that when I call htop, it shows suspiciously many threads, see screenshot.
It used to be ~ 250, and after reinstalling the entire system and setting up nginx, there were 1000 of them!
As I understand it, nginx probably creates so many threads.
The only thing I changed was php7.2 instead of 7.0 and increased pm.max_children from 200 to 500 in the /etc/php/7.2/fpm/pool.d/www.conf file Why the flows increased so much is not clear.
Who knows how to fix this situation and whether it needs to be fixed? What can be wrong?

Answer 1

Depends on the project and attendance. Although 1000 threads per gigabyte and 2 cores are somehow dofiga IMHO. If I understand correctly, they do just about nothing and just wait.