This BASH script will disable/enable the OOM (Out of Memory) killer for a given process(es)

oomkiller.bash

#!/bin/bash

if [ "$1" = "disable" ]; then

  for PID in $(pgrep $2 | grep -v oomkiller); do

    oomValue=$(cat /proc/$PID/oom_adj)

    if [ $oomValue == 0 ]; then

      echo -17 > /proc/$PID/oom_adj

    fi

  done

  exit 0
fi

if [ "$1" = "enable" ]; then

  for PID in $(pgrep $2 | grep -v oomkiller); do

    oomValue=$(cat /proc/$PID/oom_adj)

    if [ $oomValue == -17 ]; then

      echo 0 > /proc/$PID/oom_adj

    fi

  done

  exit 0
fi

Add file to /usr/local/sbin as "oomkiller" then it can be called as such:
oomkiller disable httpd
oomkiller enable httpd