Caching at the HTTP server level. How? How?

Question

Nginx

There is a fairly loaded (relatively) project. Now there are 3 servers in the infrastructure.
All backend on php5 + Postgresql. On the Nginx + php-fpm
frontend one page - a huge number of requests, although 99% of the data is quite static.
I tried to configure the cache at the Nginx level, but since the project uses sessions - the result did not bring success.
Are there any good \ convenient tools that would allow not to pull the entire nginx-php-postgres chain each time with "pieces" of static data on the page?

Answer 1

times
two
and in general the whole site by links