On 08/17/2015 03:34 AM, Michael H wrote: > the [Service] section - > [Service] > LimitSTACK=12288 ... > By the errors I will assume that it should be in the [Service] section. > I couldn't find confirmation of this online... Yes, it belongs in the [Service] section. $ man systemd.exec ... "The execution specific configuration options are configured in the [Service], [Socket], [Mount], or [Swap] sections, depending on the unit type." However, I assume that you are confused because "ulimit" in a bash shell returns a value in KiB, but LimitSTACK and setrlimit accept a value in bytes. That is, you've decreased the stack size to 12KiB, which is why PostgreSQL segfaults immediately. # cat /etc/systemd/system/postgresql.service .include /lib/systemd/system/postgresql.service [Service] LimitSTACK=12582912 # grep stack /var/lib/pgsql/data/postgresql.conf max_stack_depth = 10MB # min 100kB # systemctl daemon-reload # systemctl restart postgresql