First enter this command, to check your current setting:
sysctl vm.min_free_kbytes To change the set value, edit /etc/sysctl.conf. Look for the line:
vm.min_free_kbytes=12888 If it doesn't exist, create it (along with your desired value). The following values are acceptable:
8192 12288 16384 20480 8M is extremely conservative; it can sit at 16M comfortably. Once you change the value, run this and no reboot is needed:
sudo sysctl -p 