How can I permanently set ulimit -n 8192 in Centos 7?

Question

I would like to permanently set the open file limit for all users in Centos 7, but there seems to be a lot of conflicting information out there on the googles.

score 21 · Accepted Answer · answered Dec 06 '14 at 00:08

21

Unless they've done something really wacky (if so, blame systemd) that's all set in /etc/security/limits.conf.

*    soft    nofile 8192
*    hard    nofile 8192

Something like that.

answered Dec 06 '14 at 00:08

sysadmin1138

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score 16 · Answer 2 · edited Oct 17 '17 at 18:18

16

If you want to increase file limit for system service you'll have to edit /usr/lib/systemd/system/SOME_SERVICE.service

add LimitNOFILE,

[Service]
...
LimitNOFILE=8192

and run systemctl daemon-reload to activate changes.

Please refer to systemd execution Limit directives documentation

edited Oct 17 '17 at 18:18

Yves Martin

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answered Sep 07 '15 at 11:12

mpapec

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https://ma.ttias.be/increase-open-files-limit-in-mariadb-on-centos-7-with-systemd/ – mpapec Sep 07 '15 at 11:17
I think this solved my problem, thanks. – Hamidreza Khorammfar Dec 08 '22 at 09:22

score 11 · Answer 3 · answered May 24 '16 at 13:23

It could be done by creating new config file in: /etc/security/limits.d/ (to be on safe side when upgrading etc). For example:

/etc/security/limits.d/nofile.conf

with content as written before by sysadmin1138:

*    soft    nofile 8192
*    hard    nofile 8192

How can I permanently set ulimit -n 8192 in Centos 7?

3 Answers3