What question do you have?

Hello,
I recently run into worker_connection limitation :
1536 worker_connections are not enough while connecting to upstream

I searched how accounting is done, because I've setup those settings :
worker_connections 1536;
worker_processes 32;
worker_rlimit_nofile 4096;

If i'm right, it should be ok to handle :
1536 * 32 / 2 ( for proxypass ) = 24576 clients.

and i see ~ 1800 established 443 connections.

What i am missing ?
Some vhost have a conf with proxypass depending on endpoint, are they all taken in account ?
Or maybe there is a time / cache that retain worker connection ?

This nginx is contacted by 4 reverses proxy, does it mean only 4 worker handle connections, and one of those reverse proxy had more than 700 conn ?

Thanks for your help

PS: I fixed the problem by setting higher limits, but i want to understand what i missed.

PS2: the error on reverse proxy when reaching the limit is : peer closed connection in SSL handshake while SSL handshaking to upstream