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 >>>>> _______________________________________________ >>>>> CentOS mailing list >>>>> CentOS at centos.org >>>>> http://lists.centos.org/mailman/listinfo/centos >>>>> >>>> >>>> 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 at 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