error: can't start new thread

Question

I have a site that runs with follow configuration:

Django + mod-wsgi + apache

In one of user\'s request, I send another HTTP request to another service, and

Answer 1

I was running on a similar situation, but my process needed a lot of threads running to take care of a lot of connections.

I counted the number of threads with the command:

ps -fLu user | wc -l

It displayed 4098.

I switched to the user and looked to system limits:

sudo -u myuser -s /bin/bash

ulimit -u

Got 4096 as response.

So, I edited /etc/security/limits.d/30-myuser.conf and added the lines:

myuser hard nproc 16384

myuser soft nproc 16384

Restarted the service and now it's running with 7017 threads.

Ps. I have a 32 cores server and I'm handling 18k simultaneous connections with this configuration.