Hmmm - puzzling. One point to check, did you take them out of /boot/loader.conf ?
I set the values in etc/sysctl.conf:
# $FreeBSD: src/etc/sysctl.conf,v 1.1.2.3 2002/04/15 00:44:13 dougb Exp $ # # This file is read when going to multi-user and its contents piped thru # ``sysctl'' to adjust kernel values. ``man 5 sysctl.conf'' for details. # # Added by IMP 2005-05-04 net.inet.tcp.rfc1323=1 kern.ipc.somaxconn=1024 kern.ipc.maxsockbuf=8388608 net.inet.tcp.sendspace=3217968 net.inet.tcp.recvspace=3217968 kern.ipc.semmns="272" kern.ipc.semmni="256" kern.ipc.shmmax="66099200" kern.ipc.shmmin="256"
After a restart both shmmax and shmmin are now 0 and postgres failed to start.
Assuming so, maybe don't quote 'em (see below).
Finally you need to to set shmall, otherwise it will over(under)ride the shmmax setting. So try:
net.inet.tcp.rfc1323=1 kern.ipc.somaxconn=1024 kern.ipc.maxsockbuf=8388608 net.inet.tcp.sendspace=3217968 net.inet.tcp.recvspace=3217968 kern.ipc.semmns=272 kern.ipc.semmni=256 kern.ipc.shmmax=66099200 kern.ipc.shmmin=256 kern.ipc.shmall=32768
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