The Out of Memory (OOM) killer can be completely disabled with the following command.

WARNING: This is not recommended for production environments, because if an out-of-memory condition does present itself, there could be unexpected behavior depending on the available system resources and configuration. This unexpected behavior could be anything from a kernel panic to a hang depending on the resources available to the kernel at the time of the OOM condition.

sysctl vm.overcommit_memory=2
echo "vm.overcommit_memory=2" >> /etc/sysctl.conf