my-sys-config.sh

#!/usr/bin/env sh

# OS settings
sudo sysctl -w kern.sysv.shmmax=2147483648
sudo sysctl -w kern.sysv.shmmin=1
sudo sysctl -w kern.sysv.shmmni=64
sudo sysctl -w kern.sysv.shmseg=16
sudo sysctl -w kern.sysv.shmall=524288
sudo sysctl -w net.inet.tcp.msl=60

sudo sysctl -w net.local.dgram.recvspace=262144
sudo sysctl -w net.local.dgram.maxdgram=16384
sudo sysctl -w kern.maxfiles=131072
sudo sysctl -w kern.maxfilesperproc=131072
sudo sysctl -w net.inet.tcp.sendspace=262144
sudo sysctl -w net.inet.tcp.recvspace=262144
sudo sysctl -w kern.ipc.maxsockbuf=8388608

sudo tee -a /etc/sysctl.conf << EOF
kern.sysv.shmmax=2147483648
kern.sysv.shmmin=1
kern.sysv.shmmni=64
kern.sysv.shmseg=16
kern.sysv.shmall=524288
net.inet.tcp.msl=60

net.local.dgram.recvspace=262144
net.local.dgram.maxdgram=16384
kern.maxfiles=131072
kern.maxfilesperproc=131072
net.inet.tcp.sendspace=262144
net.inet.tcp.recvspace=262144
kern.ipc.maxsockbuf=8388608
EOF

# Step: Configure
cat >> ~/.profile << EOF
ulimit -n 65536 65536  # Increases the number of open files
export PGHOST="$(hostname)"
EOF