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.

`When i change to '-c 1000' it works fine.` that helped to stay lazy ;) — Midhun KM, Sep 29 '16 at 08:37

score 97 · Accepted Answer · answered Oct 01 '09 at 15:22

97

ulimit -n 10000

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

answered Oct 01 '09 at 15:22

catwalk

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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. – catwalk Oct 01 '09 at 15:46
Worked fine with OS X EL Capitan too. – Link14 Jun 16 '16 at 21:32
2

^^ don't do that `ulimit -n 0` – Damien Roche Mar 14 '17 at 14:41
4

^ DON'T do that ^ – jeffci Apr 05 '17 at 13:29
@jeffci why? Can you explain better? – Payedimaunt Nov 17 '22 at 20:22

score 3 · Answer 2 · answered Mar 12 '14 at 03:45

3

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

answered Mar 12 '14 at 03:45

diyism

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score 0 · Answer 3 · answered Oct 13 '09 at 21:27

0

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).

answered Oct 13 '09 at 21:27

Dan Soap

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

3 Answers3

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