On which side can there be a plug with the maximum number of tcp connections?

Question

Python

I use aiohttp for scraping. Connections go through the layer of proxy servers (230), however, with more than 550 connections, a dump of proxy servers begins, and quite massively, sometimes all at once. On the proxy side of the provider, I connected access to more than 3k connections, but this did not solve the problem. Connections to the proxy are distributed evenly so that more than 3-4x per 1 does not go (yet). In general, I can not understand where to look for the problem.

Errors returned by connections

Cannot connect to host 45.87.248.222:80 ssl:default [Too many open files]

Answer 1

Judging by the error, you hit the limit of open descriptors. Can be raised manually via ulimit. How to install for your OS permanently depends on your OS