Hi All,
Could anybody point me in the right direction for setting the kernel
parameter, max_stack_depth, to 10240 for database tuning?
I have currently set it by running 'ulimit -s 10240' but this does not
survive a reboot.
Thanks for the response, I've been nosing around that file recently but
noted the first two lines;
#This file sets the resource limits for the users logged in via PAM.
#It does not affect resource limits of the system services.
What CentOS version?
CentOS7.1
Look at the file /etc/security/limits.conf
For documentation, 'man limits.conf'
- Thomas
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I added these two lines to the end of the file
* soft stack 12288
* hard stack 12288
in an attempt to set the stack depth to 12MB so that I can configure
postgresql max_stack_depth = 10MB.
I rebooted, ulimit -s shows 12288.
When I restart my service (#It does not affect resource limits of the
system services.) becomes apparent.
Aug 14 16:22:17 db1 pg_ctl[3177]: < 2015-08-14 16:22:17.839 BST >LOG:
invalid value for parameter "max_stack_depth": 10240
Aug 14 16:22:17 db1 pg_ctl[3177]: < 2015-08-14 16:22:17.839 BST
>DETAIL:
"max_stack_depth" must not exceed 7680kB.
Aug 14 16:22:17 db1 pg_ctl[3177]: < 2015-08-14 16:22:17.839 BST >HINT:
Increase the platform's stack depth limit via "ulimit -s" or local
equivalent.
So, I then run 'ulimit -s 12288' and still can't restart my service.
How can I increase stack depth for system processes, not just PAM
authenticated users?
If this is CentOS 7 then you may need to put the ulimit directives in
the service file.
An example is I needed to increase the NOFILE limit for nfs-secure on
a Fedora 20 machine so I set
LimitNOFILE=16384
In /etc/systemd/system/nfs-secure.service
I located the service file for postgresql-9.4
[root@db1 multi-user.target.wants]# locate postgresql-9.4.service
/etc/systemd/system/multi-user.target.wants/postgresql-9.4.service
/usr/lib/systemd/system/postgresql-9.4.service
I've edited
/etc/systemd/system/multi-user.target.wants/postgresql-9.4.service and
added
LimitSTACK=12288
to the [Unit] section of the service file.
systemctl daemon-reload
systemctl restart postgresql-9.4
I'm still getting the same errors when I try to start my service...
Aug 17 08:23:58 db1 pg_ctl[16839]: < 2015-08-17 08:23:58.533 BST >LOG:
invalid value for parameter "max_stack_depth": 10240
Aug 17 08:23:58 db1 pg_ctl[16839]: < 2015-08-17 08:23:58.533 BST
>DETAIL: "max_stack_depth" must not exceed 7680kB.
I have tried moving the 'LimitSTACK=12288' to other sections of the
service file, when I do I don't get my error from postgresql I see this
in /var/log/messages
Aug 17 08:38:47 db1 systemd: Reloading.
Aug 17 08:38:47 db1 systemd:
[/usr/lib/systemd/system/dm-event.socket:10] Unknown lvalue
'RemoveOnStop' in section 'Socket'
Aug 17 08:38:47 db1 systemd:
[/usr/lib/systemd/system/lvm2-lvmetad.socket:9] Unknown lvalue
'RemoveOnStop' in section 'Socket'
Aug 17 08:38:49 db1 systemd: Starting PostgreSQL 9.4 database server...
Aug 17 08:38:49 db1 kernel: postgresql94-ch[3021]: segfault at
7ffcd1a28f30 ip 00007f116054c79e sp 00007ffcd1a28f30 error 6 in
libc-2.17.so[7f1160458000+1b6000]
Aug 17 08:38:49 db1 systemd: postgresql-9.4.service: control process
exited, code=killed status=11
Aug 17 08:38:49 db1 systemd: Failed to start PostgreSQL 9.4 database
server.
Aug 17 08:38:49 db1 systemd: Unit postgresql-9.4.service entered failed
state.
Hi All,
On the PostgreSQL mailing list I've been pointed to this URL;
https://ma.ttias.be/increase-open-files-limit-in-mariadb-on-centos-7-with-systemd/
I've created a directory (I tried changing the 9.4 to 9-4 also)
/etc/systemd/system/postgresql-9.4.service.d
/etc/systemd/system/postgresql-9-4.service.d
created a 'limits.conf' file inside this directory containing
[Service]
LimitSTACK=12288
and I'm unable to restart the service still...
I see the same errors as above when I run systemctl status
postgresql-9.4 -l.
any more suggestions?!
I have created a new directory
/etc/systemd/system/postgresql-9.4.service.d
restorecon -Frv /etc/systemd/system/postgresql-9.4.service.d
I created a limits.conf
I have tried to add this with no section -
LimitSTACK=12288
output:
Aug 17 11:18:41 db1 systemd:
[/usr/lib/systemd/system/dm-event.socket:10] Unknown lvalue
'RemoveOnStop' in section 'Socket'
Aug 17 11:18:41 db1 systemd:
[/etc/systemd/system/postgresql-9.4.service.d/limits.conf:1] Assignment
outside of section. Ignoring.
Aug 17 11:18:41 db1 systemd:
[/usr/lib/systemd/system/lvm2-lvmetad.socket:9] Unknown lvalue
'RemoveOnStop' in section 'Socket'
the [Unit] section -
[Unit]
LimitSTACK=12288
output:
Aug 17 11:20:06 db1 systemd:
[/usr/lib/systemd/system/dm-event.socket:10] Unknown lvalue
'RemoveOnStop' in section 'Socket'
Aug 17 11:20:06 db1 systemd:
[/etc/systemd/system/postgresql-9.4.service.d/limits.conf:2] Unknown
lvalue 'LimitSTACK' in section 'Unit'
Aug 17 11:20:06 db1 systemd:
[/usr/lib/systemd/system/lvm2-lvmetad.socket:9] Unknown lvalue
'RemoveOnStop' in section 'Socket'
the [Service] section -
[Service]
LimitSTACK=12288
output:
Aug 17 11:21:55 db1 systemd:
[/usr/lib/systemd/system/dm-event.socket:10] Unknown lvalue
'RemoveOnStop' in section 'Socket'
Aug 17 11:21:55 db1 systemd:
[/usr/lib/systemd/system/lvm2-lvmetad.socket:9] Unknown lvalue
'RemoveOnStop' in section 'Socket'
and the [Install] section -
[Install]
LimitSTACK=12288
output:
Aug 17 11:23:23 db1 systemd: Reloading.
Aug 17 11:23:23 db1 systemd:
[/usr/lib/systemd/system/dm-event.socket:10] Unknown lvalue
'RemoveOnStop' in section 'Socket'
Aug 17 11:23:23 db1 systemd:
[/etc/systemd/system/postgresql-9.4.service.d/limits.conf:2] Unknown
lvalue 'LimitSTACK' in section 'Install'
Aug 17 11:23:23 db1 systemd:
[/usr/lib/systemd/system/lvm2-lvmetad.socket:9] Unknown lvalue
'RemoveOnStop' in section 'Socket'
By the errors I will assume that it should be in the [Service] section.
I couldn't find confirmation of this online...
When I start postgresql-9.4
Aug 17 11:25:15 db1 systemd: Starting PostgreSQL 9.4 database server...
Aug 17 11:25:15 db1 kernel: postgresql94-ch[3762]: segfault at
7fffe1f35380 ip 00007f9ccebec79e sp 00007fffe1f35380 error 6 in
libc-2.17.so[7f9cceaf8000+1b6000]
Aug 17 11:25:15 db1 systemd: postgresql-9.4.service: control process
exited, code=killed status=11
Jason, you mentioned that you have made this change for nfs-secure, I
tried making the changes directly to the service file but received all
of the above errors, I followed the instructions at the to of the file,
created
/etc/systemd/system/postgresql-9.4.service
containing
.include /lib/systemd/system/postgresql-9.4.service
[Service]
LimitSTACK=12288
and I still see the same errors
Aug 17 11:31:39 db1 kernel: postgresql94-ch[3800]: segfault at
7ffda4ca67d0 ip 00007fe592ef479e sp 00007ffda4ca67d0 error 6 in
libc-2.17.so[7fe592e00000+1b6000]
Aug 17 11:31:39 db1 systemd: postgresql-9.4.service: control process
exited, code=killed status=11
Can anybody else make any suggestions?
thanks in advance,
Michael
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