Here are 2 scripts designed to asses the systems processes and their oom_score.
The oom score will dictate which process is most likely to be killed next by the kernel when oom-killer is invoked (due to low memory (ram))

Safest way to run the script:
git clone https://github.com/LukeShirnia/OOM-Killer-score.git
cd OOM-Killer-score
python score_check.py

To run script: Note: the python script runs faster than the bash script.
curl -s https://raw.githubusercontent.com/LukeShirnia/OOM-Killer-score/master/score_check.sh | bash
curl -s https://raw.githubusercontent.com/LukeShirnia/OOM-Killer-score/master/score_check.py | python

Or you can use the following bash one-liner (but again, python is quicker):

for i in $(find /proc -maxdepth 1 -type d); do if [ -f "$i"/oom_score ]; then printf "$(cat "$i"/oom_score) "; pid=$(echo "$i" | awk -F'/' '{print $3}';); if [ "$(cat "$i"/oom_score)" -ge 1 ];then printf "$(ps -p "$pid" -o comm=) "; fi; printf "$i/oom_score \n"; fi; done | awk '$1 > 1' | sort -nr -k1

121 mysqld /proc/24828/oom_score
103 rackspace-monit /proc/15168/oom_score 
94 varnishd /proc/13528/oom_score 
84 varnishd /proc/13527/oom_score 
45 php-fpm /proc/25685/oom_score 
44 php-fpm /proc/25686/oom_score 
42 php-fpm /proc/6820/oom_score 
42 php-fpm /proc/25687/oom_score 
41 php-fpm /proc/25684/oom_score 
40 php-fpm /proc/25683/oom_score 
39 php-fpm /proc/26555/oom_score 
36 php-fpm /proc/2879/oom_score 
36 php-fpm /proc/2868/oom_score 
19 php-fpm /proc/25681/oom_score 
17 firewalld /proc/529/oom_score 
16 driveclient /proc/21200/oom_score 
13 python /proc/10338/oom_score 
10 tuned /proc/871/oom_score 
9 polkitd /proc/4899/oom_score 
8 fail2ban-server /proc/13549/oom_score 
6 php-fpm /proc/25692/oom_score 
6 php-fpm /proc/25691/oom_score 
6 php-fpm /proc/25690/oom_score 
6 php-fpm /proc/25689/oom_score 
6 php-fpm /proc/25688/oom_score