CentOS - Apr 2015 - Mysql 5.6, Centos 7 and errno: 24 - Too many open files

Hi Johan,

Does systemd also overrule /etc/my.conf?

Thx!

Carl

On Wed, 29 Apr 2015 14:58:52 +0200
Johan Kooijman wrote:
> Gotz,
> 
> This is due to systemd, it overrules your settings. Add a file to
> systemd config fixes it:
> 
> [root at mysql2 ~]# cat /etc/systemd/system/mariadb.service.d/limits.conf
> [Service]
> LimitNOFILE=10000
> LimitMEMLOCK=10000
> 
> 
> On Wed, Apr 29, 2015 at 8:31 AM, G?tz Reinicke - IT Koordinator <
> goetz.reinicke at filmakademie.de> wrote:
> 
> > Hi,
> >
> > may be somewon has a working solution and information on that:
> >
> > I installed the most recent mysql community on a server and do get
> > a lot of "errno: 24 - Too many open files".
> >
> > There are suggestions to increase the open_files_limit, change/add
> > that to /etc/security/limits.conf and modify the systemd script by
> > hand.
> >
> > Depending on how you start mysql (restart, or at systemboot
> > time ...) the limit get set or not.
> >
> > Question: Is that may be a known bug or something?
> >
> > And thats mit a question regarding mariadb or mysql.
> >
> >         Regards . G?tz
> > --
> > G?tz Reinicke
> > IT-Koordinator
> >
> > Tel. +49 7141 969 82 420
> > E-Mail goetz.reinicke at filmakademie.de
> >
> > Filmakademie Baden-W?rttemberg GmbH
> > Akademiehof 10
> > 71638 Ludwigsburg
> > www.filmakademie.de
> >
> > Eintragung Amtsgericht Stuttgart HRB 205016
> >
> > Vorsitzender des Aufsichtsrats: J?rgen Walter MdL
> > Staatssekret?r im Ministerium f?r Wissenschaft,
> > Forschung und Kunst Baden-W?rttemberg
> >
> > Gesch?ftsf?hrer: Prof. Thomas Schadt
> >
> >
> > _______________________________________________
> > CentOS mailing list
> > CentOS at centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
> >
> 
>

Carl,

By default my.cnf has to obey the OS limits, so in this case the order is:
systemd > /etc/security/limits* > /etc/my*.

On Wed, Apr 29, 2015 at 3:22 PM, Carl E. Hartung <carlh04426 at gmail.com>
wrote:
> Hi Johan,
>
> Does systemd also overrule /etc/my.conf?
>
> Thx!
>
> Carl
>
> On Wed, 29 Apr 2015 14:58:52 +0200
> Johan Kooijman wrote:
>
> > Gotz,
> >
> > This is due to systemd, it overrules your settings. Add a file to
> > systemd config fixes it:
> >
> > [root at mysql2 ~]# cat
/etc/systemd/system/mariadb.service.d/limits.conf
> > [Service]
> > LimitNOFILE=10000
> > LimitMEMLOCK=10000
> >
> >
> > On Wed, Apr 29, 2015 at 8:31 AM, G?tz Reinicke - IT Koordinator <
> > goetz.reinicke at filmakademie.de> wrote:
> >
> > > Hi,
> > >
> > > may be somewon has a working solution and information on that:
> > >
> > > I installed the most recent mysql community on a server and do
get
> > > a lot of "errno: 24 - Too many open files".
> > >
> > > There are suggestions to increase the open_files_limit,
change/add
> > > that to /etc/security/limits.conf and modify the systemd script
by
> > > hand.
> > >
> > > Depending on how you start mysql (restart, or at systemboot
> > > time ...) the limit get set or not.
> > >
> > > Question: Is that may be a known bug or something?
> > >
> > > And thats mit a question regarding mariadb or mysql.
> > >
> > >         Regards . G?tz
> > > --
> > > G?tz Reinicke
> > > IT-Koordinator
> > >
> > > Tel. +49 7141 969 82 420
> > > E-Mail goetz.reinicke at filmakademie.de
> > >
> > > Filmakademie Baden-W?rttemberg GmbH
> > > Akademiehof 10
> > > 71638 Ludwigsburg
> > > www.filmakademie.de
> > >
> > > Eintragung Amtsgericht Stuttgart HRB 205016
> > >
> > > Vorsitzender des Aufsichtsrats: J?rgen Walter MdL
> > > Staatssekret?r im Ministerium f?r Wissenschaft,
> > > Forschung und Kunst Baden-W?rttemberg
> > >
> > > Gesch?ftsf?hrer: Prof. Thomas Schadt
> > >
> > >
> > > _______________________________________________
> > > CentOS mailing list
> > > CentOS at centos.org
> > > http://lists.centos.org/mailman/listinfo/centos
> > >
> > >
> >
> >
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>


-- 
Met vriendelijke groeten / With kind regards,
Johan Kooijman

Thank you for clarifying this, Johan. Very much appreciated!

On Wed, 29 Apr 2015 22:28:00 +0200
Johan Kooijman wrote:
> Carl,
> 
> By default my.cnf has to obey the OS limits, so in this case the
> order is: systemd > /etc/security/limits* > /etc/my*.
> 
> On Wed, Apr 29, 2015 at 3:22 PM, Carl E. Hartung
> <carlh04426 at gmail.com> wrote:
> 
> > Hi Johan,
> >
> > Does systemd also overrule /etc/my.conf?
> >
> > Thx!
> >
> > Carl
> >
> > On Wed, 29 Apr 2015 14:58:52 +0200
> > Johan Kooijman wrote:
> >
> > > Gotz,
> > >
> > > This is due to systemd, it overrules your settings. Add a file to
> > > systemd config fixes it:
> > >
> > > [root at mysql2 ~]#
> > > cat /etc/systemd/system/mariadb.service.d/limits.conf [Service]
> > > LimitNOFILE=10000
> > > LimitMEMLOCK=10000
> > >
> > >
> > > On Wed, Apr 29, 2015 at 8:31 AM, G?tz Reinicke - IT Koordinator
<
> > > goetz.reinicke at filmakademie.de> wrote:
> > >
> > > > Hi,
> > > >
> > > > may be somewon has a working solution and information on
that:
> > > >
> > > > I installed the most recent mysql community on a server and
do
> > > > get a lot of "errno: 24 - Too many open files".
> > > >
> > > > There are suggestions to increase the open_files_limit,
> > > > change/add that to /etc/security/limits.conf and modify the
> > > > systemd script by hand.
> > > >
> > > > Depending on how you start mysql (restart, or at systemboot
> > > > time ...) the limit get set or not.
> > > >
> > > > Question: Is that may be a known bug or something?
> > > >
> > > > And thats mit a question regarding mariadb or mysql.
> > > >
> > > >         Regards . G?tz
> > > > --
> > > > G?tz Reinicke
> > > > IT-Koordinator
> > > >
> > > > Tel. +49 7141 969 82 420
> > > > E-Mail goetz.reinicke at filmakademie.de
> > > >
> > > > Filmakademie Baden-W?rttemberg GmbH
> > > > Akademiehof 10
> > > > 71638 Ludwigsburg
> > > > www.filmakademie.de
> > > >
> > > > Eintragung Amtsgericht Stuttgart HRB 205016
> > > >
> > > > Vorsitzender des Aufsichtsrats: J?rgen Walter MdL
> > > > Staatssekret?r im Ministerium f?r Wissenschaft,
> > > > Forschung und Kunst Baden-W?rttemberg
> > > >
> > > > Gesch?ftsf?hrer: Prof. Thomas Schadt
> > > >
> > > >
> > > > _______________________________________________
> > > > CentOS mailing list
> > > > CentOS at centos.org
> > > > http://lists.centos.org/mailman/listinfo/centos
> > > >
> > > >
> > >
> > >
> >
> > _______________________________________________
> > CentOS mailing list
> > CentOS at centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
> 
> 
>