socket: Too many open files (24) Apache bench lighttpd

Question

When I start Apache Bench test:

ab -n 10000 -c 1300 http://example.com/test.php

I get error:

socket: Too many open files (24)

When I change it to '-c 1000' it works fine.

Because I can have more than 1000 concurrent users I would like to fix socket too many open files problem or increase parameter. How to do this and where?

I use lighttpd on CentOS 5.

Centre

When i change to '-c 1000' it works fine. that helped to stay lazy ;) – Weakness

Answer 1

ulimit -n 10000

That might not work depending on you system configuration Consult this to configure your system.

Moro

by default most systems limit number of file descriptors by 1024 per user. you need to jump through hoops to let you create more as described in the article I refer to. It worked on centos5 for me. – Moro

Worked fine with OS X EL Capitan too. – Windflower

^ DON'T do that ^ – Chronon

@Chronon why? Can you explain better? – Panel

Answer 2

to permernent change max opened files limit, you should modify /etc/security/limits.conf and reboot system:

echo -ne " 
* soft nofile 65536 
* hard nofile 65536 
" >>/etc/security/limits.conf 

Millman

Answer 3

Check out the documentation for lighty. You might have to set the server.max-fds option. Also server.max-connections should be changed accordingly (again, see the documentation).

Filing