> Should my output from ulimit -a not correspond to my sysctl.conf > parameters? > > This server was tested heavily and rebooted tens of times before it > moved into production, I can't understand what has changed other than > now I get inconsistent output from > > sysctl -a and ulimit -a. I am quite confident this wasn't the case > before I updated today. > > ulimit -s is definitely not showing the correct parameter that I > specified in /etc/sysctl.conf. Hi Jonny, A little google and I found my original conversation on here about setting it initially. Sorry for wasting your time on this, https://lists.centos.org/pipermail/centos/2015-August/154290.html So, the answer is that the service requires the LimitSTACK=[stack-size-in-bytes] in the [Service] section of /etc/systemd/system/multi-user.target.wants/postgresql.service Thank you! Michael