Re: Strange connection limit problem

Ict Security wrote:
> i have two identical Postgresql 9.6.1 and i need, to test an
> application, to reach connection above 1024.
> 
> I setup 2400 as max_connections

Ugh.  Don't.  Use a connection pool.

> I raised file-max kernel limit to 65535
> I increased shared_buffers
> I also increased the value in semaphores in both
> And i added this in limits.conf:
> * - nofile 999999
> 
> But - and it is really strange - in machine nr. 1 i can start
> thousands of connections while in machine nr. 2 after 1024 connections
> Postgres does not accept anything else.

What is the error message in the log?

What do you see in /proc/12345/limits and /proc/12345/cgroup
(assuming that your postmaster PID is 12345)?

Yours,
Laurenz Albe
-- 
Cybertec | https://www.cybertec-postgresql.com