Large number of error “512 worker_connections are not enough”

[yunoasgit@…]

nginx version: nginx/1.17.3

Worker connections configured or a large number of errors reported.

nginx.conf

worker_rlimit_nofile 65535;

events

{

use epoll;
worker_connections 65535;

}

Large number of error

2020/01/08 15:33:23 [alert] 32784#0: 512 worker_connections are not enough
2020/01/08 15:33:23 [alert] 32784#0: 512 worker_connections are not enough
2020/01/08 15:33:23 [alert] 32784#0: 512 worker_connections are not enough

linux
# ulimit -a
open files (-n) 635360
......

[yunoasgit@…]

Multiple servers, the same specific is 512

Year-on-year test

Same server, same configuration

1.16.x no such problem

Thank you very much.

[Maxim Dounin]

The "512 worker_connections are not enough" error with worker_connections 65535; in the configuration suggests one of the following:

• Either the configuration in question is not used. Make sure you've reloaded the configuration after changing it. Make sure you are editing correct configuration file - the one that is used by your nginx instance. To make sure consider adding a deliberate syntax error to the file and check if nginx refuses to start.
• Or you are using a third party module which tries to open connections in a helper process. Consider checking "nginx -V" output and your configuration to make sure you are seeing the problem without any 3rd party modules.

If unsure, please provide full "nginx -V" output, and full configuration (full "nginx -T" output). Please also provide details about the process which reports errors ("ps -ef | grep nginx" output and some recent "worker_connections are not enough" errors).

[Maxim Dounin]

Feedback timeout.

[yunoasgit@…]

512 may not be dynamic

Want it to prompt

"65535 worker_connections are not enough"

Thank you very much.

[Maxim Dounin]

The worker_connections can be reconfigured dynamically, though you have to instruct nginx to reload the configuration. Please see comment:2 for suggested steps on how to understand what is wrong in your particular configuration.